Neoplasms of the bony orbit and contents except the eyeball.
Diseases of the bony orbit and contents except the eyeball.
Abnormal protrusion of both eyes; may be caused by endocrine gland malfunction, malignancy, injury, or paralysis of the extrinsic muscles of the eye.
The surgical removal of the contents of the orbit. This includes the eyeball, blood vessels, muscles, fat, nerve supply, and periosteum. It should be differentiated from EYE EVISCERATION which removes the inner contents of the eye, leaving the sclera intact.
The muscles that move the eye. Included in this group are the medial rectus, lateral rectus, superior rectus, inferior rectus, inferior oblique, superior oblique, musculus orbitalis, and levator palpebrae superioris.
An autoimmune disorder of the EYE, occurring in patients with Graves disease. Subtypes include congestive (inflammation of the orbital connective tissue), myopathic (swelling and dysfunction of the extraocular muscles), and mixed congestive-myopathic ophthalmopathy.
Surgery performed on the eye or any of its parts.
Inanimate objects that become enclosed in the eye.
The environment outside the earth or its atmosphere. The environment may refer to a closed cabin (such as a space shuttle or space station) or to space itself, the moon, or other planets.
Tumors or cancer of the EYE.
A nonspecific tumor-like inflammatory lesion in the ORBIT of the eye. It is usually composed of mature LYMPHOCYTES; PLASMA CELLS; MACROPHAGES; LEUKOCYTES with varying degrees of FIBROSIS. Orbital pseudotumors are often associated with inflammation of the extraocular muscles (ORBITAL MYOSITIS) or inflammation of the lacrimal glands (DACRYOADENITIS).
Travel beyond the earth's atmosphere.
The surgical removal of the eyeball leaving the eye muscles and remaining orbital contents intact.
Recession of the eyeball into the orbit.
Rounded objects made of coral, teflon, or alloplastic polymer and covered with sclera, and which are implanted in the orbit following enucleation. An artificial eye (EYE, ARTIFICIAL) is usually attached to the anterior of the orbital implant for cosmetic purposes.
A visual symptom in which a single object is perceived by the visual cortex as two objects rather than one. Disorders associated with this condition include REFRACTIVE ERRORS; STRABISMUS; OCULOMOTOR NERVE DISEASES; TROCHLEAR NERVE DISEASES; ABDUCENS NERVE DISEASES; and diseases of the BRAIN STEM and OCCIPITAL LOBE.
Diseases of the lacrimal apparatus.
Planet that is the third in order from the sun. It is one of the four inner or terrestrial planets of the SOLAR SYSTEM.
Congenital absence of the eye or eyes.
Tomography using x-ray transmission and a computer algorithm to reconstruct the image.
Celestial bodies orbiting around the sun or other stars.
The loss of calcium salts from bones and teeth. Bacteria may be responsible for this occurrence in teeth. Old age may be a factor contributing to calcium loss, as is the presence of diseases such as rheumatoid arthritis.
One of the paired, but seldom symmetrical, air spaces located between the inner and outer compact layers of the FRONTAL BONE in the forehead.
Damage or trauma inflicted to the eye by external means. The concept includes both surface injuries and intraocular injuries.
A ready-made or custom-made prosthesis of glass or plastic shaped and colored to resemble the anterior portion of a normal eye and used for cosmetic reasons. It is attached to the anterior portion of an orbital implant (ORBITAL IMPLANTS) which is placed in the socket of an enucleated or eviscerated eye. (From Dorland, 28th ed)
General or unspecified injuries to the soft tissue or bony portions of the face.
Hemorrhage within the orbital cavity, posterior to the eyeball.
The organ of sight constituting a pair of globular organs made up of a three-layered roughly spherical structure specialized for receiving and responding to light.
The interdisciplinary science that studies evolutionary biology, including the origin and evolution of the major elements required for life, their processing in the interstellar medium and in protostellar systems. This field also includes the study of chemical evolution and the subsequent interactions between evolving biota and planetary evolution as well as the field of biology that deals with the study of extraterrestrial life.
The 3d cranial nerve. The oculomotor nerve sends motor fibers to the levator muscles of the eyelid and to the superior rectus, inferior rectus, and inferior oblique muscles of the eye. It also sends parasympathetic efferents (via the ciliary ganglion) to the muscles controlling pupillary constriction and accommodation. The motor fibers originate in the oculomotor nuclei of the midbrain.
Devices, manned and unmanned, which are designed to be placed into an orbit about the Earth or into a trajectory to another celestial body. (NASA Thesaurus, 1988)
Tumors of cancer of the EYELIDS.
An autosomal recessive disorder characterized by short stature, defective GROWTH HORMONE RECEPTOR, and failure to generate INSULIN-LIKE GROWTH FACTOR I by GROWTH HORMONE. Laron syndrome is not a form of primary pituitary dwarfism (GROWTH HORMONE DEFICIENCY DWARFISM) but the result of mutation of the human GHR gene on chromosome 5.
Substances that are energetically unstable and can produce a sudden expansion of the material, called an explosion, which is accompanied by heat, pressure and noise. Other things which have been described as explosive that are not included here are explosive action of laser heating, human performance, sudden epidemiological outbreaks, or fast cell growth.
A vascular anomaly that is a collection of tortuous BLOOD VESSELS and connective tissue. This tumor-like mass with the large vascular space is filled with blood and usually appears as a strawberry-like lesion in the subcutaneous areas of the face, extremities, or other regions of the body including the central nervous system.
Neoplasms of the bony part of the skull.
An irregular unpaired bone situated at the SKULL BASE and wedged between the frontal, temporal, and occipital bones (FRONTAL BONE; TEMPORAL BONE; OCCIPITAL BONE). Sphenoid bone consists of a median body and three pairs of processes resembling a bat with spread wings. The body is hollowed out in its inferior to form two large cavities (SPHENOID SINUS).
A retention cyst of the salivary gland, lacrimal sac, paranasal sinuses, appendix, or gallbladder. (Stedman, 26th ed)
The SKELETON of the HEAD including the FACIAL BONES and the bones enclosing the BRAIN.
Each of the upper and lower folds of SKIN which cover the EYE when closed.
Conjunctival diseases refer to medical conditions that affect the conjunctiva, the thin, transparent membrane that covers the white part of the eye and lines the inside of the eyelids.
Diseases affecting or involving the PARANASAL SINUSES and generally manifesting as inflammation, abscesses, cysts, or tumors.
Non-invasive method of demonstrating internal anatomy based on the principle that atomic nuclei in a strong magnetic field absorb pulses of radiofrequency energy and emit them as radiowaves which can be reconstructed into computerized images. The concept includes proton spin tomographic techniques.
The air space located in the body of the MAXILLARY BONE near each cheek. Each maxillary sinus communicates with the middle passage (meatus) of the NASAL CAVITY on the same side.
Voluntary or reflex-controlled movements of the eye.
The single family of PRIMATES in the infraorder TARSII, suborder HAPLORHINI. It is comprised of one genus, Tarsius, that inhabits southern Sumatra, Borneo, Sulawesi, and the Philippines.
The 2nd cranial nerve which conveys visual information from the RETINA to the brain. The nerve carries the axons of the RETINAL GANGLION CELLS which sort at the OPTIC CHIASM and continue via the OPTIC TRACTS to the brain. The largest projection is to the lateral geniculate nuclei; other targets include the SUPERIOR COLLICULI and the SUPRACHIASMATIC NUCLEI. Though known as the second cranial nerve, it is considered part of the CENTRAL NERVOUS SYSTEM.
Diseases affecting the eye.
Deeply perforating or puncturing type intraocular injuries.
Finely divided solid matter with particle sizes smaller than a micrometeorite, thus with diameters much smaller than a millimeter, moving in interplanetary space. (NASA Thesaurus, 1994)
Air-filled spaces located within the bones around the NASAL CAVITY. They are extensions of the nasal cavity and lined by the ciliated NASAL MUCOSA. Each sinus is named for the cranial bone in which it is located, such as the ETHMOID SINUS; the FRONTAL SINUS; the MAXILLARY SINUS; and the SPHENOID SINUS.
The compartment containing the inferior part and anterior extremities of the frontal lobes (FRONTAL LOBE) of the cerebral hemispheres. It is formed mainly by orbital parts of the FRONTAL BONE and the lesser wings of the SPHENOID BONE.
Paralysis of one or more of the ocular muscles due to disorders of the eye muscles, neuromuscular junction, supporting soft tissue, tendons, or innervation to the muscles.
Inflammation of the loose connective tissues around the ORBIT, bony structure around the eyeball. It is characterized by PAIN; EDEMA of the CONJUNCTIVA; swelling of the EYELIDS; EXOPHTHALMOS; limited eye movement; and loss of vision.
The science concerned with celestial bodies and the observation and interpretation of the radiation received in the vicinity of the earth from the component parts of the universe (McGraw Hill Dictionary of Scientific and Technical Terms, 5th ed)
The tear-forming and tear-conducting system which includes the lacrimal glands, eyelid margins, conjunctival sac, and the tear drainage system.
The fifth planet in order from the sun. It is one of the five outer planets of the solar system. Its sixteen natural satellites include Callisto, Europa, Ganymede, and Io.
Inflammation of the lacrimal sac. (Dorland, 27th ed)
High-energy radiation or particles from extraterrestrial space that strike the earth, its atmosphere, or spacecraft and may create secondary radiation as a result of collisions with the atmosphere or spacecraft.
The compartment containing the anterior extremities and half the inferior surface of the temporal lobes (TEMPORAL LOBE) of the cerebral hemispheres. Lying posterior and inferior to the anterior cranial fossa (CRANIAL FOSSA, ANTERIOR), it is formed by part of the TEMPORAL BONE and SPHENOID BONE. It is separated from the posterior cranial fossa (CRANIAL FOSSA, POSTERIOR) by crests formed by the superior borders of the petrous parts of the temporal bones.
The sixth planet in order from the sun. It is one of the five outer planets of the solar system. Its twelve natural satellites include Phoebe and Titan.
Condition in which no acceleration, whether due to gravity or any other force, can be detected by an observer within a system. It also means the absence of weight or the absence of the force of gravity acting on a body. Microgravity, gravitational force between 0 and 10 -6 g, is included here. (From NASA Thesaurus, 1988)
Thin outer membrane that surrounds a bone. It contains CONNECTIVE TISSUE, CAPILLARIES, nerves, and a number of cell types.
A mixed mesenchymal tumor composed of two or more mesodermal cellular elements not commonly associated, not counting fibrous tissue as one of the elements. Mesenchymomas are widely distributed in the body and about 75% are malignant. (Dorland, 27th ed; Holland et al., Cancer Medicine, 3d ed, p1866)
Facial neoplasms are abnormal growths or tumors that develop on the face, which can be benign or malignant in nature.
Drooping of the upper lid due to deficient development or paralysis of the levator palpebrae muscle.
A common form of hyperthyroidism with a diffuse hyperplastic GOITER. It is an autoimmune disorder that produces antibodies against the THYROID STIMULATING HORMONE RECEPTOR. These autoantibodies activate the TSH receptor, thereby stimulating the THYROID GLAND and hypersecretion of THYROID HORMONES. These autoantibodies can also affect the eyes (GRAVES OPHTHALMOPATHY) and the skin (Graves dermopathy).
Mild to severe infections of the eye and its adjacent structures (adnexa) by adult or larval protozoan or metazoan parasites.
Misalignment of the visual axes of the eyes. In comitant strabismus the degree of ocular misalignment does not vary with the direction of gaze. In noncomitant strabismus the degree of misalignment varies depending on direction of gaze or which eye is fixating on the target. (Miller, Walsh & Hoyt's Clinical Neuro-Ophthalmology, 4th ed, p641)
Tumors or cancer of the CONJUNCTIVA.
The group of celestial bodies, including the EARTH, orbiting around and gravitationally bound by the sun. It includes eight planets, one minor planet, and 34 natural satellites, more than 1,000 observed comets, and thousands of lesser bodies known as MINOR PLANETS (asteroids) and METEOROIDS. (From Academic American Encyclopedia, 1983)
Cell surface proteins that bind pituitary THYROTROPIN (also named thyroid stimulating hormone or TSH) and trigger intracellular changes of the target cells. TSH receptors are present in the nervous system and on target cells in the thyroid gland. Autoantibodies to TSH receptors are implicated in thyroid diseases such as GRAVES DISEASE and Hashimoto disease (THYROIDITIS, AUTOIMMUNE).
Autosomal dominant CRANIOSYNOSTOSIS with shallow ORBITS; EXOPHTHALMOS; and maxillary hypoplasia.
A 2,4,6-trinitrotoluene, which is an explosive chemical that can cause skin irritation and other toxic consequences.
Artery originating from the internal carotid artery and distributing to the eye, orbit and adjacent facial structures.
Tissue that supports and binds other tissues. It consists of CONNECTIVE TISSUE CELLS embedded in a large amount of EXTRACELLULAR MATRIX.
Any fluid-filled closed cavity or sac that is lined by an EPITHELIUM. Cysts can be of normal, abnormal, non-neoplastic, or neoplastic tissues.
Benign and malignant neoplasms that arise from the optic nerve or its sheath. OPTIC NERVE GLIOMA is the most common histologic type. Optic nerve neoplasms tend to cause unilateral visual loss and an afferent pupillary defect and may spread via neural pathways to the brain.
Any operation on the cranium or incision into the cranium. (Dorland, 28th ed)
Chemical and physical transformation of the biogenic elements from their nucleosynthesis in stars to their incorporation and subsequent modification in planetary bodies and terrestrial biochemistry. It includes the mechanism of incorporation of biogenic elements into complex molecules and molecular systems, leading up to the origin of life.
Rare neoplasms of mesenchymal origin, usually benign, and most commonly involving the PLEURA (see SOLITARY FIBROUS TUMOR, PLEURAL). They also are found in extrapleural sites.
Creation and development of bodies within solar systems, includes study of early planetary geology.
Eyelid diseases refer to medical conditions that affect the eyelids, including infections, allergies, tumors, and disorders that affect their function or appearance.
Tumors or cancer of the MAXILLARY SINUS. They represent the majority of paranasal neoplasms.
A form of ocular misalignment characterized by an excessive convergence of the visual axes, resulting in a "cross-eye" appearance. An example of this condition occurs when paralysis of the lateral rectus muscle causes an abnormal inward deviation of one eye on attempted gaze.
The solid substance formed by the FREEZING of water.
Disorders that feature impairment of eye movements as a primary manifestation of disease. These conditions may be divided into infranuclear, nuclear, and supranuclear disorders. Diseases of the eye muscles or oculomotor cranial nerves (III, IV, and VI) are considered infranuclear. Nuclear disorders are caused by disease of the oculomotor, trochlear, or abducens nuclei in the BRAIN STEM. Supranuclear disorders are produced by dysfunction of higher order sensory and motor systems that control eye movements, including neural networks in the CEREBRAL CORTEX; BASAL GANGLIA; CEREBELLUM; and BRAIN STEM. Ocular torticollis refers to a head tilt that is caused by an ocular misalignment. Opsoclonus refers to rapid, conjugate oscillations of the eyes in multiple directions, which may occur as a parainfectious or paraneoplastic condition (e.g., OPSOCLONUS-MYOCLONUS SYNDROME). (Adams et al., Principles of Neurology, 6th ed, p240)
A suborder of PRIMATES consisting of the following five families: CHEIROGALEIDAE; Daubentoniidae; Indriidae; LEMURIDAE; and LORISIDAE.
A sebaceous gland that, in some animals, acts as an accessory to the lacrimal gland. The harderian gland excretes fluid that facilitates movement of the third eyelid.
An environment simulating one or more parameters of the space environment, applied in testing space systems or components. Often, a closed chamber is used, capable of approximating the vacuum and normal environments of space. (From NASA Thesaurus, 1988) This also includes simulated EXTRAVEHICULAR ACTIVITY studies in atmosphere exposure chambers or water tanks.
An irregularly shaped venous space in the dura mater at either side of the sphenoid bone.
The natural satellite of the planet Earth. It includes the lunar cycles or phases, the lunar month, lunar landscapes, geography, and soil.
Acute suppurative inflammation of the inner eye with necrosis of the sclera (and sometimes the cornea) and extension of the inflammation into the orbit. Pain may be severe and the globe may rupture. In endophthalmitis the globe does not rupture.
A cystic form of sweat gland adenoma (ADENOMA, SWEAT GLAND). It is produced by the cystic proliferation of apocrine secretory glands. It is not uncommon, occurring in adult life in no particular age group, with males and females equally affected. The commonest site is around the eye, particularly lateral to the outer canthus. It is cured by surgical removal. (Stedman, 25th ed; Rook et al., Textbook of Dermatology, 4th ed, p2410)
Members of spacecraft crew including those who travel in space, and those in training for space flight. (From Webster, 10th ed; Jane's Aerospace Dictionary, 3d ed)
A malignant tumor arising from the nuclear layer of the retina that is the most common primary tumor of the eye in children. The tumor tends to occur in early childhood or infancy and may be present at birth. The majority are sporadic, but the condition may be transmitted as an autosomal dominant trait. Histologic features include dense cellularity, small round polygonal cells, and areas of calcification and necrosis. An abnormal pupil reflex (leukokoria); NYSTAGMUS, PATHOLOGIC; STRABISMUS; and visual loss represent common clinical characteristics of this condition. (From DeVita et al., Cancer: Principles and Practice of Oncology, 5th ed, p2104)
Head injuries which feature compromise of the skull and dura mater. These may result from gunshot wounds (WOUNDS, GUNSHOT), stab wounds (WOUNDS, STAB), and other forms of trauma.
Either of a pair of bones that form the prominent part of the CHEEK and contribute to the ORBIT on each side of the SKULL.
Any solid objects moving in interplanetary space that are smaller than a planet or asteroid but larger than a molecule. Meteorites are any meteoroid that has fallen to a planetary surface. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
Systems that provide all or most of the items necessary for maintaining life and health. Provisions are made for the supplying of oxygen, food, water, temperature and pressure control, disposition of carbon dioxide and body waste. The milieu may be a spacecraft, a submarine, or the surface of the moon. In medical care, usually under hospital conditions, LIFE SUPPORT CARE is available. (From Webster's New Collegiate Dictionary)
An acute, diffuse, and suppurative inflammation of loose connective tissue, particularly the deep subcutaneous tissues, and sometimes muscle, which is most commonly seen as a result of infection of a wound, ulcer, or other skin lesions.
Remains, impressions, or traces of animals or plants of past geological times which have been preserved in the earth's crust.
The most benign and common form of Langerhans-cell histiocytosis which involves localized nodular lesions predominantly of the bones but also of the gastric mucosa, small intestine, lungs, or skin, with infiltration by EOSINOPHILS.
Congenital or developmental anomaly in which the eyeballs are abnormally small.
The surgical removal of the inner contents of the eye, leaving the sclera intact. It should be differentiated from ORBIT EVISCERATION which removes the entire contents of the orbit, including eyeball, blood vessels, muscles, fat, nerve supply, and periosteum.
Sweat gland neoplasms are abnormal growths that develop in sweat glands, which can be benign or malignant.
The process of generating three-dimensional images by electronic, photographic, or other methods. For example, three-dimensional images can be generated by assembling multiple tomographic images with the aid of a computer, while photographic 3-D images (HOLOGRAPHY) can be made by exposing film to the interference pattern created when two laser light sources shine on an object.
Inflammation of the NASAL MUCOSA in the FRONTAL SINUS. In many cases, it is caused by an infection of the bacteria STREPTOCOCCUS PNEUMONIAE or HAEMOPHILUS INFLUENZAE.
The inability to see or the loss or absence of perception of visual stimuli. This condition may be the result of EYE DISEASES; OPTIC NERVE DISEASES; OPTIC CHIASM diseases; or BRAIN DISEASES affecting the VISUAL PATHWAYS or OCCIPITAL LOBE.
Diseases of the oculomotor nerve or nucleus that result in weakness or paralysis of the superior rectus, inferior rectus, medial rectus, inferior oblique, or levator palpebrae muscles, or impaired parasympathetic innervation to the pupil. With a complete oculomotor palsy, the eyelid will be paralyzed, the eye will be in an abducted and inferior position, and the pupil will be markedly dilated. Commonly associated conditions include neoplasms, CRANIOCEREBRAL TRAUMA, ischemia (especially in association with DIABETES MELLITUS), and aneurysmal compression. (From Adams et al., Principles of Neurology, 6th ed, p270)
Inflammation of the NASAL MUCOSA in the MAXILLARY SINUS. In many cases, it is caused by an infection of the bacteria HAEMOPHILUS INFLUENZAE; STREPTOCOCCUS PNEUMONIAE; or STAPHYLOCOCCUS AUREUS.
Infection in humans and animals caused by any fungus in the order Mucorales (e.g., Absidia, Mucor, Rhizopus etc.) There are many clinical types associated with infection of the central nervous system, lung, gastrointestinal tract, skin, orbit and paranasal sinuses. In humans, it usually occurs as an opportunistic infection in patients with a chronic debilitating disease, particularly uncontrolled diabetes, or who are receiving immunosuppressive agents. (From Dorland, 28th ed)
Inanimate objects that become enclosed in the body.
Neoplasms of the base of the skull specifically, differentiated from neoplasms of unspecified sites or bones of the skull (SKULL NEOPLASMS).
Disruption of structural continuity of the body as a result of the discharge of firearms.
A malignant solid tumor arising from mesenchymal tissues which normally differentiate to form striated muscle. It can occur in a wide variety of sites. It is divided into four distinct types: pleomorphic, predominantly in male adults; alveolar (RHABDOMYOSARCOMA, ALVEOLAR), mainly in adolescents and young adults; embryonal (RHABDOMYOSARCOMA, EMBRYONAL), predominantly in infants and children; and botryoidal, also in young children. It is one of the most frequently occurring soft tissue sarcomas and the most common in children under 15. (From Dorland, 27th ed; Holland et al., Cancer Medicine, 3d ed, p2186; DeVita Jr et al., Cancer: Principles & Practice of Oncology, 3d ed, pp1647-9)
Benign, non-Langerhans-cell, histiocytic proliferative disorder that primarily affects the lymph nodes. It is often referred to as sinus histiocytosis with massive lymphadenopathy.
The upper part of the human body, or the front or upper part of the body of an animal, typically separated from the rest of the body by a neck, and containing the brain, mouth, and sense organs.
A group of disorders resulting from the abnormal proliferation of and tissue infiltration by LANGERHANS CELLS which can be detected by their characteristic Birbeck granules (X bodies), or by monoclonal antibody staining for their surface CD1 ANTIGENS. Langerhans-cell granulomatosis can involve a single organ, or can be a systemic disorder.
A mass of histologically normal tissue present in an abnormal location.
Explosions in the medical field refer to sudden and rapid releases of energy that can cause physical trauma and injury to living tissue.
A collection of blood outside the BLOOD VESSELS. Hematoma can be localized in an organ, space, or tissue.
Disorders of one or more of the twelve cranial nerves. With the exception of the optic and olfactory nerves, this includes disorders of the brain stem nuclei from which the cranial nerves originate or terminate.
Tumors or cancer of the RETINA.
Devices or objects in various imaging techniques used to visualize or enhance visualization by simulating conditions encountered in the procedure. Phantoms are used very often in procedures employing or measuring x-irradiation or radioactive material to evaluate performance. Phantoms often have properties similar to human tissue. Water demonstrates absorbing properties similar to normal tissue, hence water-filled phantoms are used to map radiation levels. Phantoms are used also as teaching aids to simulate real conditions with x-ray or ultrasonic machines. (From Iturralde, Dictionary and Handbook of Nuclear Medicine and Clinical Imaging, 1990)
Voluntary or involuntary motion of head that may be relative to or independent of body; includes animals and humans.
The application of scientific knowledge or technology to the field of radiology. The applications center mostly around x-ray or radioisotopes for diagnostic and therapeutic purposes but the technological applications of any radiation or radiologic procedure is within the scope of radiologic technology.
Tumors of the choroid; most common intraocular tumors are malignant melanomas of the choroid. These usually occur after puberty and increase in incidence with advancing age. Most malignant melanomas of the uveal tract develop from benign melanomas (nevi).
Injuries resulting when a person is struck by particles impelled with violent force from an explosion. Blast causes pulmonary concussion and hemorrhage, laceration of other thoracic and abdominal viscera, ruptured ear drums, and minor effects in the central nervous system. (From Dorland, 27th ed)
A reflex wherein impulses are conveyed from the cupulas of the SEMICIRCULAR CANALS and from the OTOLITHIC MEMBRANE of the SACCULE AND UTRICLE via the VESTIBULAR NUCLEI of the BRAIN STEM and the median longitudinal fasciculus to the OCULOMOTOR NERVE nuclei. It functions to maintain a stable retinal image during head rotation by generating appropriate compensatory EYE MOVEMENTS.
Inflammation of the NASAL MUCOSA in one or more of the PARANASAL SINUSES.
High molecular weight proteins found in the MICROTUBULES of the cytoskeletal system. Under certain conditions they are required for TUBULIN assembly into the microtubules and stabilize the assembled microtubules.
Wounds caused by objects penetrating the skin.
A dull red, firm, dome-shaped hemangioma, sharply demarcated from surrounding skin, usually located on the head and neck, which grows rapidly and generally undergoes regression and involution without scarring. It is caused by proliferation of immature capillary vessels in active stroma, and is usually present at birth or occurs within the first two or three months of life. (Dorland, 27th ed)
Computed tomography modalities which use a cone or pyramid-shaped beam of radiation.
The fourth planet in order from the sun. Its two natural satellites are Deimos and Phobos. It is one of the four inner or terrestrial planets of the solar system.
Conditions which produce injury or dysfunction of the second cranial or optic nerve, which is generally considered a component of the central nervous system. Damage to optic nerve fibers may occur at or near their origin in the retina, at the optic disk, or in the nerve, optic chiasm, optic tract, or lateral geniculate nuclei. Clinical manifestations may include decreased visual acuity and contrast sensitivity, impaired color vision, and an afferent pupillary defect.
A method of computed tomography that uses radionuclides which emit a single photon of a given energy. The camera is rotated 180 or 360 degrees around the patient to capture images at multiple positions along the arc. The computer is then used to reconstruct the transaxial, sagittal, and coronal images from the 3-dimensional distribution of radionuclides in the organ. The advantages of SPECT are that it can be used to observe biochemical and physiological processes as well as size and volume of the organ. The disadvantage is that, unlike positron-emission tomography where the positron-electron annihilation results in the emission of 2 photons at 180 degrees from each other, SPECT requires physical collimation to line up the photons, which results in the loss of many available photons and hence degrades the image.
A benign tumor composed, wholly or in part, of cells with the morphologic characteristics of HISTIOCYTES and with various fibroblastic components. Fibrous histiocytomas can occur anywhere in the body. When they occur in the skin, they are called dermatofibromas or sclerosing hemangiomas. (From DeVita Jr et al., Cancer: Principles & Practice of Oncology, 5th ed, p1747)
Disorders of the nose, general or unspecified.
A relatively common neoplasm of the CENTRAL NERVOUS SYSTEM that arises from arachnoidal cells. The majority are well differentiated vascular tumors which grow slowly and have a low potential to be invasive, although malignant subtypes occur. Meningiomas have a predilection to arise from the parasagittal region, cerebral convexity, sphenoidal ridge, olfactory groove, and SPINAL CANAL. (From DeVita et al., Cancer: Principles and Practice of Oncology, 5th ed, pp2056-7)
Three-dimensional representation to show anatomic structures. Models may be used in place of intact animals or organisms for teaching, practice, and study.
FIBROUS DYSPLASIA OF BONE involving only one bone.
A type of neurofibroma manifesting as a diffuse overgrowth of subcutaneous tissue, usually involving the face, scalp, neck, and chest but occasionally occurring in the abdomen or pelvis. The tumors tend to progress, and may extend along nerve roots to eventually involve the spinal roots and spinal cord. This process is almost always a manifestation of NEUROFIBROMATOSIS 1. (From Adams et al., Principles of Neurology, 6th ed, p1016; J Pediatr 1997 Nov;131(5):678-82)
Fibrous blood-filled cyst in the bone. Although benign it can be destructive causing deformity and fractures.
The white, opaque, fibrous, outer tunic of the eyeball, covering it entirely excepting the segment covered anteriorly by the cornea. It is essentially avascular but contains apertures for vessels, lymphatics, and nerves. It receives the tendons of insertion of the extraocular muscles and at the corneoscleral junction contains the canal of Schlemm. (From Cline et al., Dictionary of Visual Science, 4th ed)
The turning inward of the lines of sight toward each other.
Removal and pathologic examination of specimens in the form of small pieces of tissue from the living body.
Infection by a variety of fungi, usually through four possible mechanisms: superficial infection producing conjunctivitis, keratitis, or lacrimal obstruction; extension of infection from neighboring structures - skin, paranasal sinuses, nasopharynx; direct introduction during surgery or accidental penetrating trauma; or via the blood or lymphatic routes in patients with underlying mycoses.
Studies used to test etiologic hypotheses in which inferences about an exposure to putative causal factors are derived from data relating to characteristics of persons under study or to events or experiences in their past. The essential feature is that some of the persons under study have the disease or outcome of interest and their characteristics are compared with those of unaffected persons.
Motion of an object in which either one or more points on a line are fixed. It is also the motion of a particle about a fixed point. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
The facial skeleton, consisting of bones situated between the cranial base and the mandibular region. While some consider the facial bones to comprise the hyoid (HYOID BONE), palatine (HARD PALATE), and zygomatic (ZYGOMA) bones, MANDIBLE, and MAXILLA, others include also the lacrimal and nasal bones, inferior nasal concha, and vomer but exclude the hyoid bone. (Jablonski, Dictionary of Dentistry, 1992, p113)
A microtubule structure that forms during CELL DIVISION. It consists of two SPINDLE POLES, and sets of MICROTUBULES that may include the astral microtubules, the polar microtubules, and the kinetochore microtubules.
Carcinoma characterized by bands or cylinders of hyalinized or mucinous stroma separating or surrounded by nests or cords of small epithelial cells. When the cylinders occur within masses of epithelial cells, they give the tissue a perforated, sievelike, or cribriform appearance. Such tumors occur in the mammary glands, the mucous glands of the upper and lower respiratory tract, and the salivary glands. They are malignant but slow-growing, and tend to spread locally via the nerves. (Dorland, 27th ed)
A surgical operation for the relief of pressure in a body compartment or on a body part. (From Dorland, 28th ed)
A form of ocular misalignment where the visual axes diverge inappropriately. For example, medial rectus muscle weakness may produce this condition as the affected eye will deviate laterally upon attempted forward gaze. An exotropia occurs due to the relatively unopposed force exerted on the eye by the lateral rectus muscle, which pulls the eye in an outward direction.
Procedures used to reconstruct, restore, or improve defective, damaged, or missing structures.
The positioning and accommodation of eyes that allows the image to be brought into place on the FOVEA CENTRALIS of each eye.
Injuries to the optic nerve induced by a trauma to the face or head. These may occur with closed or penetrating injuries. Relatively minor compression of the superior aspect of orbit may also result in trauma to the optic nerve. Clinical manifestations may include visual loss, PAPILLEDEMA, and an afferent pupillary defect.
Extranodal lymphoma of lymphoid tissue associated with mucosa that is in contact with exogenous antigens. Many of the sites of these lymphomas, such as the stomach, salivary gland, and thyroid, are normally devoid of lymphoid tissue. They acquire mucosa-associated lymphoid tissue (MALT) type as a result of an immunologically mediated disorder.
Clarity or sharpness of OCULAR VISION or the ability of the eye to see fine details. Visual acuity depends on the functions of RETINA, neuronal transmission, and the interpretative ability of the brain. Normal visual acuity is expressed as 20/20 indicating that one can see at 20 feet what should normally be seen at that distance. Visual acuity can also be influenced by brightness, color, and contrast.
An autosomal dominant inherited disorder (with a high frequency of spontaneous mutations) that features developmental changes in the nervous system, muscles, bones, and skin, most notably in tissue derived from the embryonic NEURAL CREST. Multiple hyperpigmented skin lesions and subcutaneous tumors are the hallmark of this disease. Peripheral and central nervous system neoplasms occur frequently, especially OPTIC NERVE GLIOMA and NEUROFIBROSARCOMA. NF1 is caused by mutations which inactivate the NF1 gene (GENES, NEUROFIBROMATOSIS 1) on chromosome 17q. The incidence of learning disabilities is also elevated in this condition. (From Adams et al., Principles of Neurology, 6th ed, pp1014-18) There is overlap of clinical features with NOONAN SYNDROME in a syndrome called neurofibromatosis-Noonan syndrome. Both the PTPN11 and NF1 gene products are involved in the SIGNAL TRANSDUCTION pathway of Ras (RAS PROTEINS).
An order of MAMMALS, usually flesh eaters with appropriate dentition. Suborders include the terrestrial carnivores Fissipedia, and the aquatic carnivores PINNIPEDIA.
Bony cavity that holds the eyeball and its associated tissues and appendages.
Accumulation of purulent material in tissues, organs, or circumscribed spaces, usually associated with signs of infection.
A neoplasm that arises from SCHWANN CELLS of the cranial, peripheral, and autonomic nerves. Clinically, these tumors may present as a cranial neuropathy, abdominal or soft tissue mass, intracranial lesion, or with spinal cord compression. Histologically, these tumors are encapsulated, highly vascular, and composed of a homogenous pattern of biphasic fusiform-shaped cells that may have a palisaded appearance. (From DeVita Jr et al., Cancer: Principles and Practice of Oncology, 5th ed, pp964-5)
Death resulting from the presence of a disease in an individual, as shown by a single case report or a limited number of patients. This should be differentiated from DEATH, the physiological cessation of life and from MORTALITY, an epidemiological or statistical concept.
Mechanical compression of nerves or nerve roots from internal or external causes. These may result in a conduction block to nerve impulses (due to MYELIN SHEATH dysfunction) or axonal loss. The nerve and nerve sheath injuries may be caused by ISCHEMIA; INFLAMMATION; or a direct mechanical effect.
A relatively small nodular inflammatory lesion containing grouped mononuclear phagocytes, caused by infectious and noninfectious agents.
The evaluation of incidents involving the loss of function of a device. These evaluations are used for a variety of purposes such as to determine the failure rates, the causes of failures, costs of failures, and the reliability and maintainability of devices.
Methods of creating machines and devices.
The anterior portion of the head that includes the skin, muscles, and structures of the forehead, eyes, nose, mouth, cheeks, and jaw.
Infections in the inner or external eye caused by microorganisms belonging to several families of bacteria. Some of the more common genera found are Haemophilus, Neisseria, Staphylococcus, Streptococcus, and Chlamydia.
A computer based method of simulating or analyzing the behavior of structures or components.
Evaluation undertaken to assess the results or consequences of management and procedures used in combating disease in order to determine the efficacy, effectiveness, safety, and practicability of these interventions in individual cases or series.
A technique of inputting two-dimensional images into a computer and then enhancing or analyzing the imagery into a form that is more useful to the human observer.
Slender, cylindrical filaments found in the cytoskeleton of plant and animal cells. They are composed of the protein TUBULIN and are influenced by TUBULIN MODULATORS.
The blending of separate images seen by each eye into one composite image.
Tumors or cancer of the NOSE.
The measurement of the dimensions of the HEAD.
Proteins that originate from insect species belonging to the genus DROSOPHILA. The proteins from the most intensely studied species of Drosophila, DROSOPHILA MELANOGASTER, are the subject of much interest in the area of MORPHOGENESIS and development.
Injuries caused by impact with a blunt object where there is no penetration of the skin.
Proteins which participate in contractile processes. They include MUSCLE PROTEINS as well as those found in other cells and tissues. In the latter, these proteins participate in localized contractile events in the cytoplasm, in motile activity, and in cell aggregation phenomena.
An abrupt voluntary shift in ocular fixation from one point to another, as occurs in reading.
The amount of radiation energy that is deposited in a unit mass of material, such as tissues of plants or animal. In RADIOTHERAPY, radiation dosage is expressed in gray units (Gy). In RADIOLOGIC HEALTH, the dosage is expressed by the product of absorbed dose (Gy) and quality factor (a function of linear energy transfer), and is called radiation dose equivalent in sievert units (Sv).
The use of IONIZING RADIATION to treat malignant NEOPLASMS and some benign conditions.
The process in which light signals are transformed by the PHOTORECEPTOR CELLS into electrical signals which can then be transmitted to the brain.
Neoplasms of whatever cell type or origin, occurring in the extraskeletal connective tissue framework of the body including the organs of locomotion and their various component structures, such as nerves, blood vessels, lymphatics, etc.
Studies in which individuals or populations are followed to assess the outcome of exposures, procedures, or effects of a characteristic, e.g., occurrence of disease.
Improvement of the quality of a picture by various techniques, including computer processing, digital filtering, echocardiographic techniques, light and ultrastructural MICROSCOPY, fluorescence spectrometry and microscopy, scintigraphy, and in vitro image processing at the molecular level.
The vessels carrying blood away from the capillary beds.
Computer systems or networks designed to provide radiographic interpretive information.
Ability of neoplasms to infiltrate and actively destroy surrounding tissue.
Awareness of oneself in relation to time, place and person.
A species of the genus MACACA inhabiting India, China, and other parts of Asia. The species is used extensively in biomedical research and adapts very well to living with humans.
A type of CELL NUCLEUS division by means of which the two daughter nuclei normally receive identical complements of the number of CHROMOSOMES of the somatic cells of the species.
Any of a group of malignant tumors of lymphoid tissue that differ from HODGKIN DISEASE, being more heterogeneous with respect to malignant cell lineage, clinical course, prognosis, and therapy. The only common feature among these tumors is the absence of giant REED-STERNBERG CELLS, a characteristic of Hodgkin's disease.
Ultrasonography applying the Doppler effect, with the superposition of flow information as colors on a gray scale in a real-time image. This type of ultrasonography is well-suited to identifying the location of high-velocity flow (such as in a stenosis) or of mapping the extent of flow in a certain region.
Theoretical representations that simulate the behavior or activity of biological processes or diseases. For disease models in living animals, DISEASE MODELS, ANIMAL is available. Biological models include the use of mathematical equations, computers, and other electronic equipment.
A general term for various neoplastic diseases of the lymphoid tissue.
Euploid male germ cells of an early stage of SPERMATOGENESIS, derived from prespermatogonia. With the onset of puberty, spermatogonia at the basement membrane of the seminiferous tubule proliferate by mitotic then meiotic divisions and give rise to the haploid SPERMATOCYTES.
The total area or space visible in a person's peripheral vision with the eye looking straightforward.

Ruptured aneurysm of the orbitofrontal artery associated with dural arteriovenous malformation in the anterior cranial fossa--case report. (1/749)

A 27-year-old male presented with a rare association of a ruptured orbitofrontal artery aneurysm and a dural arteriovenous malformation (DAVM) fed by both ethmoidal arteries, manifestation as severe headache, nausea, and vomiting. Computed tomography revealed a hematoma within the right frontal lobe and diffuse subarachnoid hemorrhage. The aneurysm was clipped successfully and the hematoma was evacuated. After an uneventful postoperative course, the patient was referred for gamma knife radiosurgery to treat the DAVM. In this case, the DAVM was asymptomatic and pathogenetically unrelated to the aneurysm, which demanded urgent treatment.  (+info)

Development of an animal model of autoimmune thyroid eye disease. (2/749)

In previous studies we have transferred thyroiditis to naive BALB/c and NOD mice with human thyrotropin (TSH) receptor (TSHR)-primed splenocytes. Because the TSHR has been implicated in the pathogenesis of thyroid eye disease (TED) we have examined the orbits of recipients of TSHR-primed T cells, generated using a TSHR fusion protein or by genetic immunization. In the NOD mice, 25 of 26 animals treated with TSHR-primed T cells developed thyroiditis with considerable follicular destruction, numerous activated and CD8+ T cells, and immunoreactivity for IFN-gamma. Thyroxine levels were reduced. Thyroiditis was not induced in controls. None of the NOD animals developed any orbital pathology. Thirty-five BALB/c mice received TSHR-primed spleen cells. Thyroiditis was induced in 60-100% and comprised activated T cells, B cells, and immunoreactivity for IL-4 and IL-10. Autoantibodies to the receptor were induced, including TSH binding inhibiting Igs. A total of 17 of 25 BALB/c orbits displayed changes consisting of accumulation of adipose tissue, edema caused by periodic acid Schiff-positive material, dissociation of the muscle fibers, the presence of TSHR immunoreactivity, and infiltration by lymphocytes and mast cells. No orbital changes or thyroiditis were observed in control BALB/c mice. We have induced orbital pathology having many parallels with human TED, only in BALB/c mice, suggesting that a Th2 autoimmune response to the TSHR may be a prerequisite for the development of TED.  (+info)

CT examination of the head of the Baikal seal (Phoca sibirica). (3/749)

We carried out a computerised tomographic (CT) examination to elucidate the modifications in the head related to orbital enlargement in the Baikal seal. Transverse CT images showed that (1) the external frontal contours and the frontal sinuses are compressed medially and ventrally by the orbital enlargement; (2) the caudal part of the nasal cavity and nasopharynx are compacted ventrally; and (3) the cranial cavity is displaced caudally. The neurocranium is obviously separated from the facial part in the transverse plane at the caudal region of the orbit. The disposition of the mandible, zygomatic arch, temporal bone, and the masseter, temporal, digastric and pterygoid muscles is changed by the enlarged orbit in the 3-dimensional reorganisation of the head in this species. It is suggested that adaptation for the Lake Baikal environment primarily resulted in orbital enlargement, and that the altered orbital design may subsequently have influenced the form and function of the masticatory and respiratory system.  (+info)

The role of octreoscan in thyroid eye disease. (4/749)

Until recently there was no imaging technique available which could demonstrate pathological changes in orbital tissues and could be regarded as a reliable measure of inflammation in thyroid eye disease (TED). Pentetreotide (a synthetic derivative of somatostatin) labelled with 111In has been used to localize tumours which possess surface or membrane receptors for somatostatin in vivo using a gamma camera (1). This technique visualizes somatostatin receptors in endocrine-related tumours in vivo and predicts the inhibitory effect of the somatostatin analogue octreotide on hormone secretion by the tumours (1). By applying 111In-DTPA-d-Phe octreotide scintigraphy (octreoscan), accumulation of the radionuclide was also detected in both the thyroid and orbit of patients with Graves' disease (2-4). If peak activity in the orbit 5h after injection of radiolabelled octreotide is set at 100%, a decrease to 40+/-4% is found at 24h, significantly different from the decrease in blood pool radioactivity, which is 15+/-4% at 24h. Accumulation of the radionuclide is most probably due to the presence in the orbital tissue of activated lymphocytes bearing somatostatin receptors (5). Alternative explanations are binding to receptors on other cell types (e.g. myoblasts, fibroblasts or endothelial cells) or local blood pooling due to venous stasis by the autoimmune orbital inflammation.  (+info)

Dissociable neural responses to facial expressions of sadness and anger. (5/749)

Previous neuroimaging and neuropsychological studies have investigated the neural substrates which mediate responses to fearful, disgusted and happy expressions. No previous studies have investigated the neural substrates which mediate responses to sad and angry expressions. Using functional neuroimaging, we tested two hypotheses. First, we tested whether the amygdala has a neural response to sad and/or angry facial expressions. Secondly, we tested whether the orbitofrontal cortex has a specific neural response to angry facial expressions. Volunteer subjects were scanned, using PET, while they performed a sex discrimination task involving static grey-scale images of faces expressing varying degrees of sadness and anger. We found that increasing intensity of sad facial expression was associated with enhanced activity in the left amygdala and right temporal pole. In addition, we found that increasing intensity of angry facial expression was associated with enhanced activity in the orbitofrontal and anterior cingulate cortex. We found no support for the suggestion that angry expressions generate a signal in the amygdala. The results provide evidence for dissociable, but interlocking, systems for the processing of distinct categories of negative facial expression.  (+info)

Glaucoma patients demonstrate faulty autoregulation of ocular blood flow during posture change. (6/749)

BACKGROUND/AIMS: Autoregulation of blood flow during posture change is important to ensure consistent organ circulation. The purpose of this study was to compare the change in retrobulbar ocular blood flow in glaucoma patients with normal subjects during supine and upright posture. METHODS: 20 open angle glaucoma patients and 20 normal subjects, similar in age and sex distribution, were evaluated. Blood pressure, intraocular pressure, and retrobulbar blood velocity were tested after 30 minutes of sitting and again after 30 minutes of lying. Retrobulbar haemodynamic measures of peak systolic velocity (PSV), end diastolic velocity (EDV), and resistance index (RI) were obtained in the ophthalmic and central retinal arteries using colour Doppler imaging (CDI). RESULTS: When changing from the upright to supine posture, normal subjects demonstrated a significant increase in OA EDV (p = 0.016) and significant decrease in OA RI (p = 0.0006) and CRA RI (p = 0.016). Glaucoma patients demonstrated similar changes in OA measures of EDV (p = 0.02) and RI (p = 0.04), but no change in CRA measures. CONCLUSION: Glaucoma patients exhibit faulty autoregulation of central retinal artery blood flow during posture change.  (+info)

Orbitofrontal cortex and representation of incentive value in associative learning. (7/749)

Clinical evidence indicates that damage to ventromedial prefrontal cortex disrupts goal-directed actions that are guided by motivational and emotional factors. As a consequence, patients with such damage characteristically engage in maladaptive behaviors. Other research has shown that neurons in the corresponding orbital region of prefrontal cortex in laboratory animals encode information regarding the incentive properties of goals or expected events. The present study investigates the effect of neurotoxic orbitofrontal cortex (OFC) lesions in the rat on responses that are normally influenced by associations between a conditioned stimulus (CS) and the incentive value of reinforcement. Rats were first trained to associate a visual CS with delivery of food pellets to a food cup. As a consequence of learning, rats approached the food cup during the CS in anticipation of reinforcement. In a second training phase, injection of LiCl followed consumption of the food unconditioned stimulus (US) in the home cage, a procedure used to alter the incentive value of the US. Subsequently, rats were returned to the conditioning chamber, and their responding to the CS in the absence of the food US was tested. Lesions of OFC did not affect either the initial acquisition of a conditioned response to the light CS in the first training phase or taste aversion learning in the second training phase. In the test for devaluation, however, OFC rats exhibited no change in conditioned responding to the visual CS. This outcome contrasts with the behavior of control rats; after devaluation of the US a significant decrease occurred in approach to the food cup during presentation of the CS. The results reveal an inability of a cue to access representational information about the incentive value of associated reinforcement after OFC damage.  (+info)

Choosing between small, likely rewards and large, unlikely rewards activates inferior and orbital prefrontal cortex. (8/749)

Patients sustaining lesions of the orbital prefrontal cortex (PFC) exhibit marked impairments in the performance of laboratory-based gambling, or risk-taking, tasks, suggesting that this part of the human PFC contributes to decision-making cognition. However, to date, little is known about the particular regions of the orbital cortex that participate in this function. In the present study, eight healthy volunteers were scanned, using H(2)(15)0 PET technology, while performing a novel computerized risk-taking task. The task involved predicting which of two mutually exclusive outcomes would occur, but critically, the larger reward (and penalty) was associated with choice of the least likely outcome, whereas the smallest reward (and penalty) was associated with choice of the most likely outcome. Resolving these "conflicting" decisions was associated with three distinct foci of regional cerebral blood flow increase within the right inferior and orbital PFC: laterally, in the anterior part of the middle frontal gyrus [Brodmann area 10 (BA 10)], medially, in the orbital gyrus (BA 11), and posteriorly, in the anterior portion of the inferior frontal gyrus (BA 47). By contrast, increases in the degree of conflict inherent in these decisions was associated with only limited changes in activity within orbital PFC and the anterior cingulate cortex. These results suggest that decision making recruits neural activity from multiple regions of the inferior PFC that receive information from a diverse set of cortical and limbic inputs, and that the contribution of the orbitofrontal regions may involve processing changes in reward-related information.  (+info)

Orbital neoplasms refer to tumors or growths that develop in the orbit, which is the bony socket that surrounds the eye. These neoplasms can be benign (non-cancerous) or malignant (cancerous) and can affect the muscles, nerves, fat, or other tissues in the orbit. Some common types of orbital neoplasms include: 1. Benign tumors: These include adenomas (tumors made up of glandular tissue), hemangiomas (tumors made up of blood vessels), and schwannomas (tumors made up of nerve tissue). 2. Malignant tumors: These include squamous cell carcinomas (cancers that start in the squamous cells of the skin), melanomas (cancers that start in the pigment-producing cells of the skin), and lymphomas (cancers that start in the lymphatic system). 3. Inflammatory conditions: These include orbital inflammation, which can cause swelling and pain in the orbit. Orbital neoplasms can cause a variety of symptoms, including double vision, eye pain, swelling around the eye, and changes in the shape or size of the eye. Treatment options for orbital neoplasms depend on the type and location of the tumor, as well as the patient's overall health. Treatment may include surgery, radiation therapy, chemotherapy, or a combination of these approaches.

In the medical field, "orbital diseases" refer to any disorders or conditions that affect the orbit, which is the bony socket that surrounds the eye. The orbit contains the eye, its muscles, and its associated structures, such as the eyelids, tear glands, and blood vessels. Some examples of orbital diseases include: 1. Orbital inflammation: This is an inflammation of the tissues within the orbit, which can cause pain, swelling, and redness around the eye. 2. Orbital tumors: These are abnormal growths of tissue within the orbit, which can be benign or malignant. 3. Orbital fractures: These are breaks or fractures in the bones of the orbit, which can occur as a result of trauma or other causes. 4. Orbital dystrophies: These are genetic disorders that affect the development or function of the eye and its associated structures. 5. Orbital infections: These are infections that affect the tissues within the orbit, which can cause pain, swelling, and redness around the eye. Treatment for orbital diseases depends on the specific condition and its severity. It may involve medications, surgery, or other interventions to manage symptoms and prevent complications.

Exophthalmos is a medical condition characterized by the protrusion or bulging of one or both eyes forward from the orbit. It is also known as proptosis or exophthalmos bulbi. Exophthalmos can be caused by a variety of factors, including inflammation or swelling of the orbit, tumors or masses in the orbit or surrounding tissues, Graves' disease, thyroid eye disease, or other eye or orbital disorders. In some cases, exophthalmos may be a symptom of a more serious underlying condition, such as a brain tumor or an infection of the orbit. Treatment for exophthalmos depends on the underlying cause and may include medications, surgery, or other therapies.

Graves Ophthalmopathy, also known as thyroid eye disease, is an autoimmune disorder that affects the muscles and tissues around the eyes. It is a common complication of Graves' disease, an autoimmune disorder that causes the thyroid gland to produce too much thyroid hormone. The symptoms of Graves Ophthalmopathy can include inflammation and swelling of the eyelids, double vision, bulging eyes, and in severe cases, vision loss. The condition can also cause dryness, redness, and irritation of the eyes. Graves Ophthalmopathy is typically treated with medications to reduce inflammation and slow the progression of the disease. In some cases, surgery may be necessary to correct eye problems or improve the appearance of the eyes. It is important for people with Graves Ophthalmopathy to work closely with their healthcare provider to manage their symptoms and prevent complications.

Eye Foreign Bodies refer to any foreign object that enters the eye, causing injury or irritation to the eye's surface or internal structures. These foreign bodies can be anything from small particles of dust or sand to larger objects such as metal shavings, glass fragments, or insect parts. The presence of a foreign body in the eye can cause symptoms such as pain, redness, tearing, sensitivity to light, and vision impairment. If left untreated, a foreign body can cause more serious complications such as infection, corneal ulceration, or damage to the retina. Treatment for eye foreign bodies typically involves removing the object with specialized instruments under local anesthesia. In some cases, antibiotics may be prescribed to prevent infection. It is important to seek medical attention immediately if you suspect you have a foreign body in your eye to prevent further damage.

Eye neoplasms refer to abnormal growths or tumors that develop in the eye or its surrounding tissues. These tumors can be benign (non-cancerous) or malignant (cancerous) and can affect any part of the eye, including the eyelids, conjunctiva, iris, ciliary body, choroid, and retina. Eye neoplasms can cause a variety of symptoms, depending on their location and size. Some common symptoms include changes in vision, eye pain or discomfort, redness or swelling of the eye, and the appearance of a growth or mass on the eye or eyelid. Diagnosis of eye neoplasms typically involves a comprehensive eye exam, including a visual acuity test, dilated eye exam, and imaging tests such as ultrasound, CT scan, or MRI. Treatment options for eye neoplasms depend on the type, size, and location of the tumor, as well as the patient's overall health and preferences. Treatment options may include surgery, radiation therapy, chemotherapy, or a combination of these approaches.

Orbital pseudotumor, also known as idiopathic orbital inflammatory syndrome (IOIS), is a rare condition characterized by inflammation and swelling of the tissues surrounding the eye. The exact cause of orbital pseudotumor is unknown, but it is thought to be an autoimmune response in which the body's immune system mistakenly attacks its own tissues. Symptoms of orbital pseudotumor may include pain or pressure in the eye, double vision, swelling around the eye, and redness or discoloration of the eyelid. In some cases, the inflammation may cause the eye to move or become misaligned. Diagnosis of orbital pseudotumor typically involves a combination of physical examination, imaging studies such as CT or MRI scans, and blood tests to rule out other possible causes of inflammation. Treatment may include corticosteroids to reduce inflammation, as well as antibiotics if an infection is present. In some cases, surgery may be necessary to relieve pressure on the eye or to remove any affected tissue.

Enophthalmos is a medical condition in which the eyeball is sunken or displaced inward, resulting in a hollow or sunken appearance of the eye socket. This can be caused by a variety of factors, including injury, disease, or aging. Enophthalmos can also be a symptom of other medical conditions, such as thyroid eye disease or orbital tumors. Treatment for enophthalmos depends on the underlying cause and may include surgery, medication, or other therapies.

Diplopia is a medical term that refers to double vision, which is the perception of two images of a single object. It is a common symptom that can be caused by a variety of conditions, including eye muscle disorders, brain disorders, and problems with the eyes themselves. Diplopia can affect one eye or both eyes and can be temporary or permanent. It can also be intermittent or constant, and may be accompanied by other symptoms such as headaches, nausea, or difficulty focusing. Treatment for diplopia depends on the underlying cause and may include medications, surgery, or therapy to strengthen the eye muscles.

Lacrimal apparatus diseases refer to a group of medical conditions that affect the tear drainage system of the eye. The tear drainage system, also known as the lacrimal apparatus, includes the lacrimal glands, lacrimal ducts, lacrimal sac, and nasolacrimal duct. These structures work together to produce and drain tears from the eye, keeping it moist and protected. Lacrimal apparatus diseases can be classified into two main categories: lacrimal gland diseases and lacrimal duct diseases. Lacrimal gland diseases include conditions such as dacryoadenitis (inflammation of the lacrimal gland), dacryocystitis (inflammation of the lacrimal sac), and dacryocystocele (protrusion of the lacrimal sac). Lacrimal duct diseases include conditions such as nasolacrimal duct obstruction (blockage of the nasolacrimal duct), which can cause tearing, discharge from the eye, and other symptoms. Lacrimal apparatus diseases can be treated with a variety of methods, including medications, punctal occlusion (plugging of the tear ducts), and surgery. The specific treatment approach depends on the underlying cause and severity of the condition. Early diagnosis and treatment are important to prevent complications and improve outcomes.

Anophthalmos is a medical condition characterized by the absence of one or both eyes. It can be present at birth (congenital anophthalmos) or can develop later in life due to injury, disease, or other factors. People with anophthalmos may have a variety of other medical conditions, such as cataracts, glaucoma, or retinal detachment, which can affect their vision and overall health. Treatment for anophthalmos may include the use of prosthetic eyes, special glasses or contact lenses, and other medical interventions to manage any associated medical conditions.

Pathologic decalcification refers to the abnormal loss of calcium from bone tissue. It can occur due to a variety of factors, including hormonal imbalances, vitamin D deficiency, excessive alcohol consumption, and certain medical conditions such as hyperparathyroidism or osteoporosis. Pathologic decalcification can lead to weakened bones, increased risk of fractures, and other complications. It is typically diagnosed through imaging studies such as X-rays or bone density scans, and treatment may involve addressing the underlying cause and implementing measures to increase calcium intake or prevent further bone loss.

Eye injuries refer to any damage or trauma that affects the structures of the eye, including the cornea, iris, lens, retina, optic nerve, and surrounding tissues. These injuries can be caused by a variety of factors, including physical trauma, chemical exposure, radiation, or infection. Eye injuries can range from minor to severe and can cause temporary or permanent vision loss, depending on the extent of the damage. Some common types of eye injuries include corneal abrasions, conjunctivitis, chemical burns, foreign body injuries, and retinal detachment. Treatment for eye injuries depends on the severity and type of injury. Minor injuries may be treated with eye drops or ointments, while more severe injuries may require surgery or other medical interventions. It is important to seek medical attention immediately if you suspect that you or someone else has suffered an eye injury to prevent further damage and promote the best possible outcome.

Facial injuries refer to any type of damage or trauma that affects the structures of the face, including the skin, bones, muscles, nerves, and blood vessels. These injuries can be caused by a variety of factors, such as accidents, falls, assaults, sports injuries, or surgery. Facial injuries can range from minor cuts and bruises to more severe injuries that can result in disfigurement, loss of function, or even death. Some common types of facial injuries include: 1. Fractures: These occur when the bones of the face are broken or cracked. Fractures can be open or closed, and may involve one or more bones in the face. 2. Lacerations: These are deep cuts or tears in the skin that can result from trauma or surgery. 3. Contusions: These are bruises that occur when blood vessels are damaged and blood leaks into the surrounding tissue. 4. Disfigurement: This refers to any type of permanent or temporary damage to the face that results in a change in appearance or function. 5. Nerve damage: This can occur when the nerves that control facial muscles are damaged, resulting in weakness or paralysis of the affected muscles. 6. Dental injuries: These can occur when the teeth are damaged or knocked out as a result of trauma to the face. Treatment for facial injuries depends on the severity of the injury and the specific structures that are affected. Treatment may include surgery, physical therapy, medications, or other interventions to promote healing and restore function.

Retrobulbar hemorrhage is a medical condition in which blood accumulates behind the eye, in the space between the eye and the skull. It is also known as retroorbital hemorrhage or orbital hemorrhage. This type of hemorrhage can occur due to trauma, such as a blow to the eye, or as a complication of certain medical conditions, such as high blood pressure or bleeding disorders. Symptoms of retrobulbar hemorrhage may include pain or discomfort in the eye, difficulty seeing, and swelling around the eye. Treatment for retrobulbar hemorrhage typically involves addressing the underlying cause of the bleeding and managing any complications that may arise. In severe cases, surgery may be necessary to remove the blood and relieve pressure on the eye.

Eyelid neoplasms refer to abnormal growths or tumors that develop on the eyelid. These growths can be benign (non-cancerous) or malignant (cancerous). Some common types of eyelid neoplasms include basal cell carcinoma, squamous cell carcinoma, sebaceous gland carcinoma, and melanoma. Symptoms of eyelid neoplasms may include a lump or bump on the eyelid, changes in the shape or color of the eyelid, redness or swelling, and difficulty opening or closing the eye. Treatment for eyelid neoplasms may include surgery, radiation therapy, or chemotherapy, depending on the type and stage of the tumor. Early detection and treatment are important for improving the chances of a successful outcome.

Laron syndrome is a rare genetic disorder that affects growth and metabolism. It is caused by a mutation in the growth hormone receptor gene, which leads to a deficiency in growth hormone (GH) signaling. People with Laron syndrome have short stature, a small head, and a distinctive appearance, including a long, narrow face and a large tongue. They also have insulin resistance and may develop diabetes. The syndrome is usually diagnosed in early childhood and is treated with a low-calorie diet and regular exercise to help manage symptoms.

Hemangioma, cavernous is a type of benign (non-cancerous) tumor that affects blood vessels in the body. It is also known as a cavernous hemangioma or cavernous angioma. These tumors are typically slow-growing and can occur in various parts of the body, including the brain, liver, and lungs. In the brain, cavernous hemangiomas are usually found in the cerebrum, but they can also occur in other parts of the brain, such as the brainstem or cerebellum. These tumors can cause symptoms such as headaches, seizures, and vision problems, depending on their location and size. In the liver, cavernous hemangiomas are the most common type of benign liver tumor. They are usually small and do not cause any symptoms, but larger tumors can cause abdominal pain, swelling, and discomfort. In the lungs, cavernous hemangiomas are rare and usually asymptomatic. However, in some cases, they can cause symptoms such as coughing, shortness of breath, and chest pain. Treatment for cavernous hemangiomas depends on the location, size, and symptoms of the tumor. Small, asymptomatic tumors may not require treatment, while larger or symptomatic tumors may be treated with medication, surgery, or radiation therapy.

Skull neoplasms refer to tumors or abnormal growths that develop in or on the skull. These can be either benign (non-cancerous) or malignant (cancerous). Benign skull neoplasms are usually slow-growing and do not spread to other parts of the body, while malignant skull neoplasms can be aggressive and invade surrounding tissues or spread to other parts of the body through the bloodstream or lymphatic system. Skull neoplasms can occur in any part of the skull, including the bones, nerves, and meninges (the protective membranes that cover the brain and spinal cord). Some common types of skull neoplasms include meningiomas, gliomas, and osteomas. Symptoms of skull neoplasms may include headaches, facial pain or numbness, difficulty with vision or hearing, and changes in behavior or personality. Diagnosis of skull neoplasms typically involves a combination of imaging tests, such as MRI or CT scans, and a biopsy to examine a sample of the tissue. Treatment options for skull neoplasms depend on the type, size, and location of the tumor, as well as the patient's overall health and preferences. Treatment may include surgery, radiation therapy, chemotherapy, or a combination of these approaches.

A mucocele is a cyst-like growth that forms in the mouth or throat due to the accumulation of mucus. It is typically caused by an injury to the salivary gland, which can result in the gland becoming blocked and unable to drain properly. This can lead to the buildup of mucus, which can then form a cyst. Mucoceles are usually painless and may not cause any symptoms until they become large enough to cause discomfort or interfere with speech or swallowing. They are typically diagnosed through a physical examination and imaging tests such as X-rays or CT scans. Treatment for mucoceles typically involves draining the cyst and removing any damaged tissue. This can be done through a procedure called a marsupialization, in which a small incision is made in the cyst and a small flap of tissue is created to allow the mucus to drain out. In some cases, surgery may be necessary to remove the cyst completely.

Conjunctival diseases refer to any medical conditions that affect the conjunctiva, which is the thin, transparent membrane that lines the inner surface of the eyelids and covers the white part of the eye (sclera). The conjunctiva plays an important role in protecting the eye from foreign particles, infections, and other harmful substances. Conjunctival diseases can be broadly classified into two categories: infectious and non-infectious. Infectious conjunctival diseases are caused by bacteria, viruses, fungi, or parasites, and can include conditions such as conjunctivitis (pink eye), keratitis (inflammation of the cornea), and trachoma (an infectious disease that causes blindness). Non-infectious conjunctival diseases, on the other hand, are not caused by microorganisms and can include conditions such as allergic conjunctivitis (caused by an allergic reaction to substances such as pollen or dust), chemical conjunctivitis (caused by exposure to irritants such as chemicals or smoke), and dry eye syndrome (caused by a lack of tears or poor tear quality). Treatment for conjunctival diseases depends on the underlying cause and severity of the condition. In some cases, simple measures such as washing the eyes with warm water or using over-the-counter eye drops may be sufficient. In more severe cases, prescription medications or surgery may be necessary. It is important to seek medical attention if you experience any symptoms of conjunctival disease, as prompt treatment can help prevent complications and improve outcomes.

Paranasal sinus diseases refer to a group of medical conditions that affect the paranasal sinuses, which are air-filled cavities located within the skull. These sinuses are lined with a mucous membrane that helps to filter, warm, and humidify the air that we breathe. When the paranasal sinuses become inflamed or infected, they can cause a range of symptoms, including facial pain, congestion, runny nose, and sinus pressure. There are several types of paranasal sinus diseases, including: 1. Sinusitis: This is the most common type of paranasal sinus disease, and it occurs when the sinuses become inflamed or infected. Sinusitis can be acute (lasting less than four weeks) or chronic (lasting more than 12 weeks). 2. Sinus Polyps: These are benign growths that develop on the lining of the sinuses. Sinus polyps can cause blockages in the sinuses, leading to symptoms such as congestion, facial pain, and difficulty breathing. 3. Aspergillosis: This is an infection caused by the fungus Aspergillus. It can cause inflammation and damage to the sinuses, leading to symptoms such as facial pain, headache, and fever. 4. Rhinosinusitis: This is a chronic inflammation of the nasal passages and sinuses. It can cause symptoms such as congestion, runny nose, and facial pain. 5. Nasal Polyps: These are benign growths that develop in the nasal passages. They can cause blockages and lead to symptoms such as congestion, runny nose, and difficulty breathing. Treatment for paranasal sinus diseases depends on the underlying cause and severity of the condition. It may include medications such as antibiotics, decongestants, and corticosteroids, as well as procedures such as nasal irrigation, sinus surgery, or allergy shots.

Eye diseases refer to any medical conditions that affect the eyes, including the structures and tissues that make up the eye, as well as the visual system. These conditions can range from minor irritations and infections to more serious and potentially blinding conditions. Some common examples of eye diseases include: 1. Cataracts: A clouding of the lens in the eye that can cause vision loss. 2. Glaucoma: A group of eye diseases that can damage the optic nerve and lead to vision loss. 3. Age-related macular degeneration: A progressive eye disease that affects the central part of the retina and can cause vision loss. 4. Diabetic retinopathy: A complication of diabetes that can damage the blood vessels in the retina and lead to vision loss. 5. Retinitis pigmentosa: A genetic disorder that causes progressive vision loss. 6. Conjunctivitis: An inflammation of the conjunctiva, the thin, clear membrane that covers the white part of the eye. 7. Uveitis: An inflammation of the middle layer of the eye, including the iris, ciliary body, and choroid. 8. Corneal dystrophies: A group of inherited conditions that cause abnormal growth of the cornea, the clear front part of the eye. 9. Optic neuritis: An inflammation of the optic nerve that can cause vision loss. 10. Strabismus: A condition in which the eyes do not align properly, which can cause double vision. These are just a few examples of the many eye diseases that can affect people. Early detection and treatment are important for preventing vision loss and preserving sight.

Eye injuries, penetrating refers to damage to the eye caused by a foreign object or substance that has penetrated the outer protective layer of the eye, such as the cornea or sclera. Penetrating eye injuries can be caused by a variety of objects, including sharp objects like glass or metal, as well as blunt objects like or tools. These injuries can cause damage to the internal structures of the eye, including the lens, retina, and optic nerve, which can lead to vision loss or even blindness. Treatment for penetrating eye injuries typically involves removing the foreign object and repairing any damage to the eye's internal structures. In some cases, surgery may be necessary to restore vision.

I'm sorry, but "Cosmic Dust" is not typically used in the medical field. It is a term that refers to dust particles that originate from outer space and are found on Earth. These particles can include a variety of materials, such as rock, ice, and organic matter, and they can provide valuable information about the origins and evolution of the universe. However, they are not typically studied in a medical context. If you have a specific medical question, I would be happy to try to help you with that.

The anterior cranial fossa is one of the four main divisions of the cranial cavity, which is the bony chamber that houses the brain and other structures in the skull. It is located in the front part of the skull, between the frontal bone and the lesser wing of the sphenoid bone. The anterior cranial fossa is bounded by several bones, including the frontal bone, the lesser wing of the sphenoid bone, and the nasal bone. It contains several important structures, including the cribriform plate of the ethmoid bone, which is a thin, bony plate that forms part of the roof of the nasal cavity and contains numerous small openings called olfactory foramina that allow the passage of olfactory nerves into the nasal cavity. The anterior cranial fossa also contains the frontal sinus, which is a air-filled space that is located in the frontal bone and is connected to the nasal cavity by small openings called the anterior and posterior ethmoidal foramina. The frontal sinus helps to lighten the weight of the skull and plays a role in the production of mucus that helps to keep the nasal passages moist and free of dust and other particles.

Ophthalmoplegia is a medical condition characterized by weakness or paralysis of the muscles that control eye movement. It can affect one or both eyes and can be caused by a variety of factors, including injury, infection, inflammation, or neurological disorders. Symptoms of ophthalmoplegia may include double vision, difficulty moving the eyes, drooping eyelids, and loss of vision. Treatment for ophthalmoplegia depends on the underlying cause and may include medications, surgery, or physical therapy.

Orbital cellulitis is a serious infection that affects the tissues surrounding the eye socket, also known as the orbit. It is a medical emergency that requires prompt diagnosis and treatment to prevent serious complications, such as vision loss or even blindness. The infection can be caused by bacteria, viruses, or fungi, and it typically spreads from an infection in the nose or sinuses to the orbit. Symptoms of orbital cellulitis may include redness and swelling around the eye, pain or pressure in the eye or forehead, sensitivity to light, double vision, and fever. Diagnosis of orbital cellulitis typically involves a physical examination of the eye and orbit, as well as imaging tests such as a CT scan or MRI. Treatment typically involves antibiotics to fight the infection, as well as pain medication and measures to reduce swelling. In severe cases, hospitalization may be necessary for intravenous antibiotics and other supportive care.

In the medical field, the term "astronomy" is not commonly used. However, there is a medical condition called "astronomical vertigo" which is a type of vertigo that is characterized by severe dizziness and a feeling of spinning that is worse when the head is moved. This condition is caused by a problem with the inner ear, specifically the vestibular system, which is responsible for maintaining balance and spatial orientation. Treatment for astronomical vertigo typically involves medications to reduce dizziness and physical therapy to help the brain and inner ear adapt to the changes in balance.

Dacryocystitis is a medical condition that affects the tear ducts, causing inflammation and blockage. It is commonly known as "stye of the eye" or "pink eye of the eye." The tear ducts are responsible for draining tears from the eye, and when they become blocked, tears can accumulate and cause swelling and redness around the eye. Dacryocystitis can be caused by a variety of factors, including a bacterial infection, a blockage in the tear ducts, or an injury to the eye. Symptoms of dacryocystitis may include redness and swelling around the eye, pain or discomfort when the eye is touched or moved, and a thick, yellow or green discharge from the eye. Treatment for dacryocystitis typically involves the use of antibiotics to treat any bacterial infection, as well as the use of warm compresses to help relieve swelling and pain. In some cases, a doctor may need to perform a procedure called dacryocystorhinostomy (DCR) to help unblock the tear ducts and restore normal tear drainage.

Cosmic radiation refers to high-energy particles and radiation that originate from outside our solar system and travel through space at nearly the speed of light. In the medical field, cosmic radiation is a concern for astronauts and frequent flyers who are exposed to higher levels of radiation than those on the ground. Cosmic radiation includes a variety of particles, including protons, helium nuclei, and high-energy photons (gamma rays). These particles can penetrate the human body and cause damage to cells and DNA, which can lead to an increased risk of cancer and other health problems. In space, astronauts are exposed to higher levels of cosmic radiation due to the lack of Earth's protective atmosphere and magnetic field. This exposure can increase their risk of developing cancer, cataracts, and other health problems. As a result, NASA and other space agencies have implemented measures to protect astronauts from cosmic radiation, such as using shielding materials and limiting the duration of space missions. In addition to astronauts, frequent flyers on commercial airplanes are also exposed to higher levels of cosmic radiation due to the altitude at which they fly. However, the levels of cosmic radiation on commercial flights are generally considered to be low and not a significant health concern for most people.

The cranial fossa, middle, is one of the four main divisions of the cranial cavity in the skull. It is located between the superior and inferior fossae and is bounded anteriorly by the lesser wing of the sphenoid bone and posteriorly by the petrous portion of the temporal bone. The middle cranial fossa contains several important structures, including the optic nerve, oculomotor nerve, trochlear nerve, and abducens nerve, as well as the cavernous sinus and the middle cranial fossa floor, which is formed by the sphenoid bone and the petrous portion of the temporal bone. The middle cranial fossa is also the location of the pituitary gland, which is a small endocrine gland that plays a crucial role in regulating various bodily functions.

Mesenchymoma is a rare type of cancer that arises from mesenchymal cells, which are a type of connective tissue cell that can form bone, cartilage, fat, and other tissues in the body. Mesenchymomas can occur in various parts of the body, including the chest, abdomen, and pelvis, and can be either benign (non-cancerous) or malignant (cancerous). Mesenchymomas are classified based on the specific type of mesenchymal cell from which they arise. For example, a fibrosarcoma is a type of mesenchymoma that arises from fibroblasts, which are cells that produce connective tissue. Other types of mesenchymomas include leiomyosarcoma (which arises from smooth muscle cells), osteosarcoma (which arises from bone-forming cells), and chondrosarcoma (which arises from cartilage-forming cells). Treatment for mesenchymomas depends on the type and location of the tumor, as well as the patient's overall health. Options may include surgery, radiation therapy, chemotherapy, or a combination of these approaches. The prognosis for mesenchymomas can vary widely, depending on the type and stage of the tumor, as well as the patient's age and overall health.

Facial neoplasms refer to abnormal growths or tumors that develop on the face. These growths can be benign (non-cancerous) or malignant (cancerous) and can occur on any part of the face, including the skin, bones, muscles, and nerves. Facial neoplasms can be further classified based on their location, size, and type. Some common types of facial neoplasms include basal cell carcinoma, squamous cell carcinoma, melanoma, lipomas, hemangiomas, and cysts. The diagnosis of facial neoplasms typically involves a physical examination, medical history, and imaging studies such as X-rays, CT scans, or MRI scans. Biopsy may also be necessary to confirm the diagnosis and determine the type of neoplasm. Treatment for facial neoplasms depends on the type, size, and location of the growth, as well as the patient's overall health. Treatment options may include surgery, radiation therapy, chemotherapy, or a combination of these approaches. In some cases, monitoring the growth over time may be the best course of action.

Blepharoptosis, also known as drooping eyelid, is a medical condition in which the upper eyelid droops or falls down, usually affecting only one eye. This can cause the eyelashes to touch the cornea, which can lead to irritation, redness, and even vision problems if left untreated. Blepharoptosis can be caused by a variety of factors, including muscle weakness, nerve damage, or problems with the eyelid structure. Treatment options for blepharoptosis may include surgery, physical therapy, or the use of artificial eyelid lifts.

Graves' disease is an autoimmune disorder that affects the thyroid gland, a small gland located in the neck that produces hormones that regulate metabolism. In Graves' disease, the immune system mistakenly attacks the thyroid gland, causing it to produce excessive amounts of thyroid hormones, a condition known as hyperthyroidism. The symptoms of Graves' disease can vary widely and may include weight loss, rapid or irregular heartbeat, anxiety, tremors, heat intolerance, sweating, and bulging eyes (Graves' ophthalmopathy). The disease can also cause swelling of the thyroid gland, known as a goiter. Graves' disease is typically treated with medications that help to reduce the production of thyroid hormones, such as methimazole or propylthiouracil. In some cases, surgery or radioactive iodine therapy may be necessary to remove the overactive thyroid gland or destroy the gland's ability to produce hormones.

Eye infections caused by parasites are a type of ocular disease that can affect the eyes and surrounding structures. These infections are caused by microscopic organisms such as protozoa, helminths, and arthropods that can invade the eye and cause inflammation, irritation, and damage to the eye's tissues. Some common examples of parasitic eye infections include: 1. Trachoma: A bacterial infection caused by the bacterium Chlamydia trachomatis that is transmitted through direct contact with infected individuals or contaminated objects. 2. Onchocerciasis: A parasitic infection caused by the worm Onchocerca volvulus that is transmitted through the bite of infected blackflies. 3. River blindness: Another name for onchocerciasis, which is also known as African trypanosomiasis. 4. Toxoplasmosis: A parasitic infection caused by the protozoan Toxoplasma gondii that can be transmitted through contact with infected cat feces or contaminated food and water. 5. Chagas disease: A parasitic infection caused by the protozoan Trypanosoma cruzi that is transmitted through the bite of infected triatomine bugs. These infections can cause a range of symptoms, including redness, itching, discharge, pain, and vision loss. Treatment typically involves the use of antibiotics, antiparasitic medications, or other medications to manage symptoms and prevent complications. In some cases, surgery may be necessary to remove the parasite or repair damage to the eye.

Strabismus is a medical condition in which the eyes are not aligned properly, causing them to point in different directions. This can result in double vision, difficulty seeing in depth, and other visual problems. Strabismus can be caused by a variety of factors, including muscle weakness or paralysis, nerve damage, or problems with the brain's visual processing centers. Treatment for strabismus may include glasses, patches, eye exercises, or surgery, depending on the underlying cause and severity of the condition.

Conjunctival neoplasms refer to abnormal growths or tumors that develop on the conjunctiva, which is the thin, transparent membrane that covers the white part of the eye (sclera) and lines the inside of the eyelids. These neoplasms can be benign (non-cancerous) or malignant (cancerous) and can occur in various forms, including papillomas, fibromas, adenomas, and squamous cell carcinomas. Conjunctival neoplasms can cause a variety of symptoms, including redness, swelling, discharge, irritation, and changes in vision. They can also lead to complications such as ulceration, bleeding, and perforation of the conjunctiva or sclera. Diagnosis of conjunctival neoplasms typically involves a thorough eye examination, including a visual examination, a biomicroscopic examination, and a biopsy if necessary. Treatment options depend on the type, size, and location of the neoplasm, as well as the patient's overall health and preferences. Treatment options may include observation, surgical removal, cryotherapy, radiation therapy, or chemotherapy.

Receptors, Thyrotropin (TSH receptors) are proteins found on the surface of thyroid cells that bind to and respond to thyroid-stimulating hormone (TSH), a hormone produced by the pituitary gland. TSH receptors play a critical role in regulating thyroid function by controlling the production and release of thyroid hormones, which are essential for regulating metabolism and energy production in the body. Disorders of TSH receptors can lead to a variety of thyroid conditions, including hyperthyroidism (overproduction of thyroid hormones) and hypothyroidism (underproduction of thyroid hormones).

Craniofacial dysostosis is a group of genetic disorders that affect the development of the skull and facial bones. These disorders can cause a range of physical abnormalities, including a misshapen head, facial deformities, and problems with the teeth and jaws. Craniofacial dysostosis can be caused by mutations in a number of different genes, and the specific features of the disorder can vary depending on which gene is affected. Some of the most common types of craniofacial dysostosis include Apert syndrome, Crouzon syndrome, and Pfeiffer syndrome. These disorders can be diagnosed through genetic testing and are typically treated with a combination of surgery, orthodontics, and other medical interventions.

Trinitrotoluene (TNT) is a synthetic explosive compound that is commonly used in military and industrial applications. It is not typically used in the medical field, as it is a highly toxic and explosive substance. However, TNT has been studied in some medical contexts, such as its use as a contrast agent in magnetic resonance imaging (MRI) and its potential as a treatment for certain types of cancer. In these cases, TNT is typically used in a modified or controlled form, and its use is closely monitored by medical professionals.

Connective tissue is a type of tissue that provides support, strength, and protection to the body. It is composed of cells, fibers, and a matrix of ground substance. Connective tissue is found throughout the body and can be divided into several subtypes, including loose connective tissue, dense connective tissue, cartilage, bone, and blood. Loose connective tissue is composed of cells, fibers, and a matrix of ground substance. It is found in areas such as the skin, blood vessels, and lymphatic vessels. Dense connective tissue is composed of tightly packed fibers and is found in areas such as tendons and ligaments. Cartilage is a type of connective tissue that is found in areas such as the joints and nose. Bone is a type of connective tissue that provides support and protection to the body. Blood is a type of connective tissue that carries oxygen, nutrients, and waste products throughout the body. Connective tissue plays a vital role in the body by providing support, strength, and protection to the organs and tissues. It also helps to regulate the body's temperature, distribute nutrients and oxygen, and protect against infection.

In the medical field, a cyst is a closed, fluid-filled sac that forms in or on an organ or tissue. Cysts can be benign (non-cancerous) or malignant (cancerous), and they can occur in various parts of the body, including the skin, liver, kidneys, ovaries, and brain. Cysts can be classified based on their location, size, and contents. Some common types of cysts include: 1. Epidermoid cysts: These are the most common type of cyst, and they form in the skin or hair follicles. They are usually benign and can be removed surgically. 2. Cystic acne: This is a type of cyst that occurs on the skin and is caused by the blockage of hair follicles. 3. Pancreatic cysts: These are cysts that form in the pancreas and can be either benign or malignant. 4. Kidney cysts: These are cysts that form in the kidneys and can be either benign or malignant. 5. Ovarian cysts: These are cysts that form in the ovaries and can be either benign or malignant. Treatment for cysts depends on their size, location, and type. Small cysts may not require treatment, while larger cysts or cysts that cause symptoms may need to be removed surgically. In some cases, medication may be used to treat cysts.

Optic nerve neoplasms refer to tumors or growths that develop on or near the optic nerve, which is responsible for transmitting visual information from the eye to the brain. These neoplasms can be either benign or malignant and can cause a variety of symptoms, including vision loss, eye pain, and changes in visual field. Treatment options for optic nerve neoplasms depend on the type and location of the tumor, as well as the patient's overall health and the severity of their symptoms. Some common treatments for optic nerve neoplasms include surgery, radiation therapy, and chemotherapy.

A craniotomy is a surgical procedure in which a portion of the skull is removed to access the brain. It is typically performed to treat brain tumors, bleeding, infections, or other conditions that require direct access to the brain. During a craniotomy, a surgeon will make an incision in the scalp and remove a portion of the skull, called a bone flap, to expose the brain. The surgeon will then perform the necessary procedures to treat the underlying condition and then replace the bone flap and close the incision in the scalp. Craniotomies are typically performed under general anesthesia and may require a period of recovery in the hospital.

Solitary Fibrous Tumors (SFTs) are rare, benign or low-grade malignant tumors that typically arise in the pleura (lining of the lungs and chest wall) but can also occur in other locations such as the abdomen, pelvis, and mediastinum (the space between the lungs). SFTs are composed of fibroblasts, which are cells that produce connective tissue. They are usually slow-growing and may not cause any symptoms until they become large or cause compression of surrounding structures. The diagnosis of SFT is usually made through a combination of imaging studies, such as CT or MRI, and a biopsy to examine the tissue under a microscope. Treatment for SFTs typically involves surgical removal, although in some cases, radiation therapy or chemotherapy may be used.

Eyelid diseases refer to a wide range of medical conditions that affect the eyelids, including the skin, glands, muscles, and nerves. These conditions can cause discomfort, pain, redness, swelling, tearing, and vision problems. Some common eyelid diseases include: 1. Blepharitis: Inflammation of the eyelids that can cause redness, itching, burning, and crusty discharge. 2. Meibomian gland dysfunction: A condition where the oil glands in the eyelids become clogged, leading to dryness, irritation, and redness. 3. Chalazion: A cyst that forms on the eyelid due to a blocked oil gland. 4. Stye: An infection of the oil gland at the base of the eyelash, causing redness, swelling, and pain. 5. Entropion: A condition where the eyelid turns inward, causing the eyelashes to rub against the cornea and causing irritation and tearing. 6. Ectropion: A condition where the eyelid turns outward, causing dryness, irritation, and tearing. 7. Ptosis: A condition where the eyelid droops, blocking vision. 8. Dermatitis: Inflammation of the skin on the eyelids, causing redness, itching, and dryness. 9. Allergic conjunctivitis: An allergic reaction to substances such as pollen, dust, or pet dander that causes redness, itching, and tearing. 10. Dry eye syndrome: A condition where the eyes do not produce enough tears, causing dryness, irritation, and redness. Treatment for eyelid diseases depends on the specific condition and may include medications, lifestyle changes, or surgery. It is important to seek medical attention if you experience any symptoms of an eyelid disease to prevent further complications.

Maxillary Sinus Neoplasms refer to tumors or abnormal growths that occur in the maxillary sinus, which is one of the four paired air-filled cavities located in the skull. These neoplasms can be either benign (non-cancerous) or malignant (cancerous) in nature. The maxillary sinus is located in the cheekbone and is responsible for draining mucus and air from the nose. When a neoplasm develops in the maxillary sinus, it can cause a range of symptoms, including facial pain, swelling, congestion, and difficulty breathing. Diagnosis of maxillary sinus neoplasms typically involves a combination of imaging tests, such as CT scans or MRIs, and a biopsy to confirm the presence of cancer cells. Treatment options may include surgery, radiation therapy, chemotherapy, or a combination of these approaches, depending on the type and stage of the neoplasm.

Esotropia is a medical condition in which the eyes are turned inward, towards the nose. It is a type of strabismus, which is a misalignment of the eyes. Esotropia can cause double vision, difficulty seeing in depth, and other visual problems. It is typically diagnosed in childhood and can be caused by a variety of factors, including genetics, brain abnormalities, and problems with the muscles that control eye movement. Treatment for esotropia may include glasses, patches, eye exercises, and surgery.

In the medical field, "ice" typically refers to the use of cold therapy to reduce pain, inflammation, and swelling. Ice is often applied to the affected area for 15-20 minutes at a time, several times a day, to help alleviate discomfort and promote healing. Ice therapy is commonly used to treat a variety of conditions, including sprains, strains, bruises, and muscle soreness. It can also be used to reduce inflammation and swelling after surgery or other medical procedures. It's important to note that while ice therapy can be effective for many conditions, it's not appropriate for everyone. People with certain medical conditions, such as Raynaud's disease or diabetes, may need to avoid ice therapy or use it with caution. It's always a good idea to consult with a healthcare provider before using ice therapy to ensure that it's safe and appropriate for your individual needs.

Ocular motility disorders refer to a group of conditions that affect the movement of the eyes. These disorders can be caused by a variety of factors, including damage to the nerves or muscles that control eye movement, problems with the brain's ability to coordinate eye movements, or abnormalities in the shape or position of the eyes or orbit. Symptoms of ocular motility disorders can include double vision, difficulty tracking objects with the eyes, limited ability to move the eyes in certain directions, and a sensation of the eyes being stuck or unable to move. These symptoms can be caused by a variety of conditions, including muscle weakness or paralysis, nerve damage, or problems with the brain's control of eye movement. Diagnosis of ocular motility disorders typically involves a comprehensive eye examination, including tests of eye movement and coordination, as well as imaging studies such as MRI or CT scans. Treatment options for ocular motility disorders depend on the underlying cause and may include medications, physical therapy, or surgery. In some cases, corrective lenses or other optical aids may also be helpful in improving vision and reducing symptoms.

The cavernous sinus is a large, dural venous sinus located in the skull, behind the eyes and between the brain and the base of the skull. It is a venous channel that receives blood from the brain and the head, and drains it into the jugular veins. The cavernous sinus is surrounded by the cavernous membrane, which is a layer of connective tissue that separates it from the surrounding structures. The cavernous sinus is an important part of the venous system of the brain and is involved in the circulation of blood in the head and neck. It is also a potential site of infection, bleeding, and other disorders.

Panophthalmitis is a severe and potentially blinding infection of the eye that affects all structures within the eye, including the cornea, iris, lens, and vitreous humor. It is a medical emergency that requires prompt diagnosis and treatment to prevent permanent vision loss or destruction. The infection can be caused by bacteria, fungi, viruses, or other microorganisms that enter the eye through various means, such as trauma, surgery, or contaminated contact lenses. Symptoms of panophthalmitis may include severe eye pain, redness, swelling, light sensitivity, decreased vision, and discharge from the eye. Diagnosis of panophthalmitis typically involves a thorough eye examination, including a culture of the eye fluid to identify the causative organism. Treatment typically involves the use of antibiotics or antifungal medications, as well as surgery to remove infected tissue and drain any abscesses. In severe cases, enucleation (removal of the eye) may be necessary to prevent the spread of infection to other parts of the body.

Hidrocystoma is a type of cyst that forms on the eyelid. It is a benign (non-cancerous) growth that is filled with a clear or yellowish fluid. Hidrocystomas are most commonly found on the upper eyelid, but they can also occur on the lower eyelid. They are usually small, but they can grow larger over time. Hidrocystomas are usually painless, but they can cause discomfort or irritation if they become infected or inflamed. Treatment for hidrocystomas typically involves surgical removal.

In the medical field, astronauts are individuals who are trained to travel and work in space. They are typically part of a space agency's astronaut corps and are responsible for conducting scientific experiments, maintaining the spacecraft, and performing various tasks related to space exploration. Astronauts undergo extensive medical training to prepare them for the unique challenges of living and working in space. This training includes physical fitness assessments, space medicine courses, and simulations of spaceflight emergencies. Astronauts must also be able to adapt to the effects of microgravity on the human body, such as bone density loss, muscle atrophy, and changes in vision. In addition to their physical training, astronauts also receive psychological training to help them cope with the isolation and stress of long-duration spaceflight. They must be able to work effectively as part of a team and maintain their mental health and well-being in a challenging and sometimes dangerous environment. Overall, astronauts play a critical role in advancing our understanding of space and pushing the boundaries of human exploration. Their medical training and expertise are essential to ensuring the safety and success of space missions.

Retinoblastoma is a rare type of cancer that develops in the retina of the eye, which is the light-sensitive tissue at the back of the eye. It is most commonly found in children, but can also occur in adults. Retinoblastoma is a highly aggressive cancer that can spread quickly to other parts of the body if not treated promptly. Treatment options for retinoblastoma include surgery, chemotherapy, radiation therapy, and laser therapy. Early detection and treatment are crucial for a good prognosis.

Head injuries, penetrating refers to injuries to the head caused by an object or force that penetrates the skull and enters the brain. These injuries can be caused by a variety of factors, including gunshot wounds, stab wounds, and falls with an object piercing the skull. Penetrating head injuries can be severe and can result in a range of complications, including brain damage, bleeding, infection, and death. Treatment for penetrating head injuries typically involves surgery to remove the object or repair any damage to the skull or brain, followed by intensive medical care to manage any complications and promote healing.

Cellulitis is a bacterial infection that affects the skin and the tissue just beneath the skin. It is characterized by redness, swelling, warmth, and pain in the affected area. The infection usually starts as a small red bump or pimple that quickly becomes larger and more painful. It can also spread to nearby lymph nodes and cause fever and fatigue. Cellulitis is most commonly caused by Streptococcus pyogenes, a type of bacteria that is commonly found in the throat and on the skin. Other bacteria, such as Staphylococcus aureus, can also cause cellulitis. Treatment for cellulitis typically involves antibiotics to kill the bacteria causing the infection. In severe cases, hospitalization may be necessary. It is important to seek medical attention promptly if you suspect you have cellulitis, as it can spread quickly and cause serious complications if left untreated.

Eosinophilic granuloma is a type of benign bone tumor that typically affects children and young adults. It is characterized by the accumulation of eosinophils, a type of white blood cell, in the bone tissue. The tumor usually appears in the skull, long bones, and ribs, and can cause bone pain, swelling, and deformities. Treatment typically involves surgical removal of the tumor, although in some cases, radiation therapy or medications may be used. Eosinophilic granuloma is usually not cancerous and has a good prognosis with appropriate treatment.

Microphthalmos is a medical condition characterized by an abnormally small size of one or both eyes. The term "microphthalmos" comes from the Greek words "micros," meaning small, and "ophthalmos," meaning eye. Microphthalmos can be caused by a variety of factors, including genetic mutations, exposure to certain teratogens (substances that can cause birth defects), or abnormalities in the development of the eye during fetal development. Symptoms of microphthalmos may include a small, misshapen eye, reduced vision, and an increased risk of developing glaucoma or other eye problems. In some cases, microphthalmos can also be associated with other medical conditions, such as cleft palate or intellectual disability. Treatment for microphthalmos depends on the severity of the condition and the specific symptoms experienced by the individual. In some cases, surgery may be necessary to correct vision or prevent complications such as glaucoma. In other cases, supportive care and regular monitoring by an ophthalmologist may be sufficient.

Sweat gland neoplasms are abnormal growths that develop in the sweat glands of the skin. They can be benign (non-cancerous) or malignant (cancerous). Some common types of sweat gland neoplasms include: 1. Syringoma: A benign tumor that develops in the eccrine sweat glands of the eyelids. 2. Sebaceous gland nevus: A benign tumor that develops in the sebaceous glands of the skin. 3. Malignant eccrine sweat gland carcinoma: A rare, but aggressive form of skin cancer that develops in the eccrine sweat glands. 4. Malignant apocrine sweat gland carcinoma: A rare, but aggressive form of skin cancer that develops in the apocrine sweat glands. Sweat gland neoplasms can be treated with a variety of methods, including surgery, radiation therapy, and chemotherapy. The best treatment option depends on the type and stage of the neoplasm, as well as the overall health of the patient.

Frontal sinusitis is a medical condition characterized by inflammation and infection of the frontal sinus, which is one of the four air-filled cavities located in the skull. The frontal sinus is located in the forehead and is responsible for draining mucus and other secretions from the nose. Symptoms of frontal sinusitis can include facial pain or pressure, headache, congestion, runny nose, and yellow or green discharge from the nose. In severe cases, fever, fatigue, and difficulty breathing may also occur. Frontal sinusitis can be caused by a viral or bacterial infection, allergies, or other factors such as deviated septum or nasal polyps. Treatment typically involves the use of antibiotics, decongestants, and pain relievers. In some cases, surgery may be necessary to remove blockages or correct structural abnormalities in the sinuses.

Blindness is a medical condition characterized by a severe loss of vision that affects a person's ability to see and navigate their environment. In medical terms, blindness is defined as visual acuity of less than 20/200 in the better eye, even with corrective lenses. This means that a person with blindness cannot see as well as a person with normal vision, and may have difficulty recognizing faces, reading, or performing other tasks that require good vision. Blindness can be caused by a variety of factors, including genetic disorders, eye injuries, infections, diseases such as glaucoma or cataracts, and aging. It can also be caused by neurological conditions such as stroke or brain injury, or by certain medications or toxins. Treatment for blindness depends on the underlying cause and severity of the condition. In some cases, corrective lenses or surgery may be able to improve vision. In other cases, rehabilitation and assistive technology such as braille, audio books, and guide dogs may be necessary to help individuals with blindness live independently and participate fully in society.

Oculomotor nerve diseases refer to disorders that affect the oculomotor nerve, which is responsible for controlling the movement of the eye muscles. The oculomotor nerve is the third cranial nerve and is responsible for controlling six muscles in the eye, including the superior rectus, inferior rectus, medial rectus, lateral rectus, inferior oblique, and superior oblique muscles. Oculomotor nerve diseases can be caused by a variety of factors, including trauma, infection, inflammation, tumors, and degenerative diseases. Some common oculomotor nerve diseases include: 1. Oculomotor nerve palsy: This is a condition in which the oculomotor nerve is damaged, leading to weakness or paralysis of the eye muscles. Symptoms may include drooping eyelids, double vision, and difficulty moving the eyes. 2. Myasthenia gravis: This is an autoimmune disorder that affects the muscles, including the muscles of the eye. Symptoms may include drooping eyelids, double vision, and difficulty moving the eyes. 3. Optic neuritis: This is an inflammation of the optic nerve that can cause vision loss and double vision. It can also affect the oculomotor nerve, leading to weakness or paralysis of the eye muscles. 4. Brainstem tumors: Tumors in the brainstem can compress the oculomotor nerve, leading to weakness or paralysis of the eye muscles. Symptoms may include drooping eyelids, double vision, and difficulty moving the eyes. 5. Multiple sclerosis: This is an autoimmune disorder that affects the central nervous system, including the oculomotor nerve. Symptoms may include drooping eyelids, double vision, and difficulty moving the eyes. Treatment for oculomotor nerve diseases depends on the underlying cause and may include medications, surgery, or physical therapy. It is important to seek medical attention if you experience symptoms of an oculomotor nerve disease, as early diagnosis and treatment can help prevent complications and improve outcomes.

Maxillary sinusitis is a medical condition characterized by inflammation and swelling of the maxillary sinuses, which are air-filled cavities located in the cheekbones behind the nose. The maxillary sinuses are connected to the nasal cavity through small openings called ostia, and they play a role in filtering, warming, and humidifying the air we breathe. Symptoms of maxillary sinusitis may include facial pain or pressure, headache, congestion or runny nose, postnasal drip, cough, and fever. The condition can be caused by a viral or bacterial infection, allergies, or other factors such as deviated septum, nasal polyps, or dental problems. Treatment for maxillary sinusitis may include over-the-counter pain relievers, decongestants, nasal sprays, and antibiotics if the infection is caused by bacteria. In severe cases, surgery may be necessary to open up the blocked ostia and relieve pressure in the sinuses.

Mucormycosis is a rare but serious fungal infection caused by a group of molds called mucormycetes. These molds are commonly found in soil, decaying plants, and organic matter. Mucormycosis can affect various parts of the body, including the sinuses, lungs, skin, and gastrointestinal tract. The infection is usually acquired through inhalation of fungal spores, but it can also occur through skin contact or ingestion of contaminated food or water. People with weakened immune systems, such as those with diabetes, cancer, or HIV, are at higher risk of developing mucormycosis. Symptoms of mucormycosis can vary depending on the affected area of the body. Common symptoms include fever, cough, shortness of breath, headache, and facial pain or swelling. In severe cases, the infection can spread to the brain, leading to neurological symptoms such as confusion, seizures, and coma. Mucormycosis is a life-threatening infection that requires prompt diagnosis and treatment. Treatment typically involves antifungal medications, surgery to remove infected tissue, and supportive care to manage symptoms and complications.

In the medical field, a foreign body refers to any object that is not normally present in the body and has been introduced into it accidentally or intentionally. Foreign bodies can be found in various parts of the body, including the respiratory system, gastrointestinal tract, urinary tract, and other organs. Foreign bodies can be classified into different types based on their size, shape, and composition. Some common examples of foreign bodies include coins, buttons, toys, bones, glass fragments, metal objects, and food particles. Foreign bodies can cause a range of symptoms, depending on their location and size. In some cases, they may cause no symptoms at all, while in others, they can lead to pain, swelling, infection, bleeding, or other complications. Diagnosis of a foreign body usually involves a combination of medical history, physical examination, imaging studies (such as X-rays, CT scans, or MRI), and sometimes endoscopy or surgery. Treatment of a foreign body depends on its location, size, and composition, as well as the patient's overall health and medical history. In some cases, the foreign body may be removed using minimally invasive techniques, while in others, surgery may be necessary.

Skull base neoplasms refer to tumors that develop in the skull base region, which is the area where the skull and the base of the brain meet. The skull base is a complex and critical area of the body, containing vital structures such as the brainstem, cranial nerves, and blood vessels. Skull base neoplasms can be either benign or malignant and can arise from a variety of tissues, including bone, cartilage, nerves, and blood vessels. These tumors can cause a range of symptoms, depending on their location and size, including headache, hearing loss, facial weakness, and difficulty swallowing or speaking. Treatment options for skull base neoplasms may include surgery, radiation therapy, chemotherapy, or a combination of these approaches.

Wounds, gunshot refers to injuries caused by firearms, including bullets, shrapnel, and other projectiles. These injuries can range from minor to severe and can affect any part of the body. Gunshot wounds can cause damage to skin, muscle, bone, blood vessels, nerves, and organs, and can result in bleeding, infection, and other complications. Treatment for gunshot wounds typically involves emergency medical care, including wound cleaning,,,,。

Rhabdomyosarcoma is a type of cancer that arises from the cells that form skeletal muscle. It is the most common soft tissue sarcoma in children and adolescents, and can occur in any part of the body, but is most commonly found in the head and neck, genitourinary system, and extremities. Rhabdomyosarcoma is a highly aggressive cancer, and treatment typically involves a combination of surgery, chemotherapy, and radiation therapy. Despite aggressive treatment, the prognosis for rhabdomyosarcoma varies depending on the location and stage of the cancer, as well as the age and overall health of the patient.

Histiocytosis, Sinus is a rare disorder characterized by the abnormal proliferation of histiocytes (a type of white blood cell) in the sinuses of the skull. The condition can affect both children and adults, and its symptoms can vary depending on the severity and location of the affected sinuses. The most common form of histiocytosis, sinus is called eosinophilic granuloma, which is characterized by the accumulation of eosinophils (a type of white blood cell) in the affected sinuses. Other forms of histiocytosis, sinus include Langerhans cell histiocytosis (LCH), which is a more aggressive form of the disease that can affect multiple organs, and Letterer-Siwe disease, which is a rare and severe form of LCH that primarily affects infants and young children. Symptoms of histiocytosis, sinus can include facial swelling, headaches, nasal congestion, and difficulty breathing. In some cases, the condition can cause vision problems or hearing loss if it affects the sinuses near the eyes or ears. Treatment for histiocytosis, sinus typically involves the use of medications to reduce inflammation and slow the growth of the affected cells. In more severe cases, surgery may be necessary to remove the affected tissue.

Histiocytosis, Langerhans-Cell is a rare disorder characterized by the accumulation of abnormal white blood cells called Langerhans cells in various tissues throughout the body. These cells are a type of immune system cell that normally plays a role in defending the body against infection and foreign substances. There are several different types of Langerhans cell histiocytosis, including Letterer-Siwe disease, Hand-Schüller-Christian disease, and eosinophilic granuloma. These conditions can affect people of all ages, but they are most common in children. The symptoms of Langerhans cell histiocytosis can vary depending on the type and location of the affected tissue. Common symptoms include fever, weight loss, fatigue, and swelling in the lymph nodes, liver, or spleen. In some cases, the disease can also affect the bones, skin, and other organs. Treatment for Langerhans cell histiocytosis typically involves a combination of medications, such as corticosteroids and chemotherapy, as well as surgery to remove affected tissue. The prognosis for people with this condition depends on the type and severity of the disease, as well as the age and overall health of the individual.

Choristoma is a medical term used to describe the abnormal growth of tissue that is not normally present in a particular location. It is a type of teratoma, which is a tumor that arises from the embryonic tissue. Choristomas can occur in various parts of the body, including the skin, liver, spleen, and brain. They are usually benign, meaning they are not cancerous, but they can sometimes cause problems if they grow too large or if they are located in a sensitive area. Treatment for choristomas typically involves surgical removal, although in some cases, they may not require any treatment if they are small and not causing any symptoms.

Hematoma is a medical term that refers to the accumulation of blood in a tissue or organ. It occurs when a blood vessel breaks or leaks, causing blood to leak out into the surrounding tissue. Hematomas can be classified as either acute or chronic, depending on the length of time that the blood has been accumulating. Acute hematomas occur suddenly and are usually the result of trauma, such as a blow to the head or a fall. They can be painful and may cause swelling and discoloration of the affected area. Acute hematomas can be treated with ice packs, compression, and elevation of the affected area. Chronic hematomas, on the other hand, occur over a longer period of time and are often the result of a slow leak of blood from a blood vessel. They can be more difficult to treat and may require surgery to remove the accumulated blood. Hematomas can occur in any part of the body, but are most commonly found in the brain, liver, and muscles. They can be serious if they are large or if they occur in critical areas of the body, such as the brain or spinal cord. Treatment for hematomas depends on the size, location, and cause of the hematoma, as well as the overall health of the patient.

Cranial nerve diseases refer to disorders or injuries that affect the cranial nerves, which are a group of 12 nerves that originate from the brain and control various functions of the head and neck. These nerves are responsible for controlling movement, sensation, and other functions such as hearing, taste, and smell. Cranial nerve diseases can be caused by a variety of factors, including infections, tumors, trauma, degenerative diseases, and genetic disorders. Some common examples of cranial nerve diseases include: 1. Bell's palsy: A condition that affects the seventh cranial nerve, causing facial paralysis or weakness on one side of the face. 2. Meningitis: An infection of the membranes that surround the brain and spinal cord, which can affect any of the cranial nerves. 3. Trigeminal neuralgia: A condition that causes severe pain in the face, typically triggered by simple activities such as chewing or talking. 4. Multiple sclerosis: A chronic autoimmune disorder that can affect any part of the body, including the cranial nerves, causing symptoms such as numbness, weakness, and vision problems. 5. Acoustic neuroma: A benign tumor that grows on the eighth cranial nerve, which controls hearing and balance. 6. Optic neuritis: An inflammation of the optic nerve that can cause vision loss or double vision. 7. Guillain-Barré syndrome: An autoimmune disorder that can cause muscle weakness and paralysis, including weakness in the cranial nerves that control eye movement and facial expression. Treatment for cranial nerve diseases depends on the underlying cause and the specific symptoms experienced by the patient. Treatment options may include medications, surgery, physical therapy, or other interventions.

Retinal neoplasms refer to abnormal growths or tumors that develop on the retina, which is the light-sensitive layer of tissue at the back of the eye. These neoplasms can be either benign (non-cancerous) or malignant (cancerous) in nature. Retinal neoplasms can occur in various parts of the retina, including the choroid, the layer of blood vessels and connective tissue beneath the retina, and the pigment epithelium, the layer of cells that covers the retina and helps to nourish and maintain it. Retinal neoplasms can cause a range of symptoms, depending on their size, location, and type. Some common symptoms include changes in vision, such as blurred vision, floaters, or flashes of light, as well as pain or discomfort in the eye. Diagnosis of retinal neoplasms typically involves a comprehensive eye exam, including dilated eye exams, imaging tests such as optical coherence tomography (OCT) or fluorescein angiography, and sometimes a biopsy to confirm the diagnosis. Treatment for retinal neoplasms depends on the type, size, and location of the tumor, as well as the patient's overall health and preferences. Options may include observation, laser therapy, cryotherapy, radiation therapy, or surgery.

Choroid neoplasms are abnormal growths or tumors that develop in the choroid layer of the eye. The choroid is a layer of blood vessels and connective tissue that lies between the retina and the sclera, and it plays an important role in regulating blood flow to the retina and providing nutrients to the eye. Choroid neoplasms can be either benign (non-cancerous) or malignant (cancerous). Benign choroid neoplasms are usually slow-growing and do not spread to other parts of the body. Malignant choroid neoplasms, on the other hand, can grow quickly and spread to other parts of the body through the bloodstream or lymphatic system. Symptoms of choroid neoplasms may include vision loss, floaters (spots or specks that appear in the field of vision), and changes in the appearance of the eye (such as a bulge or swelling). Diagnosis typically involves a comprehensive eye exam, including imaging tests such as ultrasound or magnetic resonance imaging (MRI). Treatment for choroid neoplasms depends on the type, size, and location of the tumor, as well as the patient's overall health and preferences. Options may include observation, laser therapy, radiation therapy, or surgery. It is important to consult with an ophthalmologist or other healthcare provider for proper diagnosis and treatment.

Blast injuries are a type of traumatic injury that occur when a person is exposed to a powerful explosion. These injuries can be caused by a variety of explosive devices, including bombs, grenades, and landmines. Blast injuries can affect any part of the body, but they are most common in the head, neck, and chest. Blast injuries can cause a range of physical and psychological effects, depending on the severity of the injury and the location of the blast. Physical injuries can include fractures, lacerations, and burns, as well as internal injuries such as organ damage and traumatic brain injury. Psychological effects can include post-traumatic stress disorder (PTSD), anxiety, and depression. Treatment for blast injuries depends on the specific injuries sustained. In some cases, surgery may be necessary to repair physical injuries, while psychological treatment may be necessary to address the emotional effects of the injury. In addition, rehabilitation may be necessary to help the person recover and regain function.

Sinusitis is a medical condition characterized by inflammation and swelling of the sinuses, which are air-filled cavities located in the skull. The sinuses are lined with mucus membranes that help to filter and moisten the air we breathe. When these membranes become inflamed, they can produce excess mucus, which can lead to congestion, facial pain, and pressure. Sinusitis can be caused by a variety of factors, including viral or bacterial infections, allergies, environmental irritants, and structural abnormalities of the sinuses. The condition can be acute or chronic, with acute sinusitis typically lasting for less than four weeks and chronic sinusitis lasting for more than 12 weeks. Symptoms of sinusitis can include facial pain or pressure, congestion, runny nose, postnasal drip, cough, fever, and fatigue. Treatment for sinusitis depends on the underlying cause and can include medications such as antibiotics, decongestants, and nasal corticosteroids, as well as lifestyle changes and home remedies. In severe cases, surgery may be necessary to correct structural abnormalities or drain blocked sinuses.

Microtubule-associated proteins (MAPs) are a group of proteins that bind to microtubules, which are important components of the cytoskeleton in cells. These proteins play a crucial role in regulating the dynamics of microtubules, including their assembly, disassembly, and stability. MAPs are involved in a wide range of cellular processes, including cell division, intracellular transport, and the maintenance of cell shape. They can also play a role in the development of diseases such as cancer, where the abnormal regulation of microtubules and MAPs can contribute to the growth and spread of tumors. There are many different types of MAPs, each with its own specific functions and mechanisms of action. Some MAPs are involved in regulating the dynamics of microtubules, while others are involved in the transport of molecules along microtubules. Some MAPs are also involved in the organization and function of the mitotic spindle, which is essential for the proper segregation of chromosomes during cell division. Overall, MAPs are important regulators of microtubule dynamics and play a crucial role in many cellular processes. Understanding the function of these proteins is important for developing new treatments for diseases that are associated with abnormal microtubule regulation.

In the medical field, "Wounds, Penetrating" refers to injuries that involve a break in the skin or other body tissues caused by an object or force that has penetrated through the skin. These types of wounds can be caused by a variety of objects, including sharp objects such as knives, bullets, or glass, as well as blunt objects such as hammers or rocks. Penetrating wounds can be classified based on the depth of the injury and the location of the entry and exit wounds. For example, a through-and-through wound is one in which the object passes completely through the body, leaving an entry wound and an exit wound on opposite sides. A blind wound, on the other hand, is one in which the object does not pass completely through the body, leaving only an entry wound. Penetrating wounds can be serious and may require immediate medical attention, as they can cause damage to vital organs or structures within the body. Treatment for penetrating wounds may include cleaning and debriding the wound,(suture)the wound, and administering antibiotics to prevent infection. In some cases, surgery may be necessary to repair damage to internal organs or structures.

Hemangioma, Capillary is a type of benign (non-cancerous) tumor that is made up of blood vessels. It is also known as a "vascular malformation" or "angioma." Capillary hemangiomas are the most common type of hemangioma and are typically found in infants and young children. They are usually located on the skin, but can also occur in other parts of the body, such as the liver, brain, and bones. Capillary hemangiomas are usually not painful and often go away on their own without treatment. However, in some cases, treatment may be necessary to prevent complications or to improve the appearance of the affected area.

Cone-beam computed tomography (CBCT) is a type of medical imaging technology that uses a cone-shaped X-ray beam to create 3D images of the inside of the body. It is often used in dentistry and orthodontics to create detailed images of the teeth, jaws, and surrounding structures. CBCT is also used in other medical fields, such as neurology, oncology, and maxillofacial surgery, to diagnose and plan treatment for a variety of conditions. Unlike traditional CT scans, which use a linear X-ray beam and multiple rotations of the patient to create images, CBCT uses a single rotation of the X-ray beam and a cone-shaped detector to capture a large volume of data in a single scan. This allows for faster imaging and reduced radiation exposure compared to traditional CT scans.

Optic nerve diseases refer to a group of medical conditions that affect the optic nerve, which is the nerve responsible for transmitting visual information from the retina to the brain. These diseases can cause a range of symptoms, including vision loss, eye pain, and changes in visual perception. Some common optic nerve diseases include: 1. Glaucoma: A group of eye diseases that damage the optic nerve, often caused by elevated pressure inside the eye. 2. Optic neuritis: Inflammation of the optic nerve that can cause vision loss, eye pain, and sensitivity to light. 3. Optic atrophy: A condition in which the optic nerve becomes thin and weak, leading to vision loss. 4. Leber's hereditary optic neuropathy: A genetic disorder that causes progressive vision loss, often starting in young adulthood. 5. Optic nerve drusen: Small deposits of calcium and other minerals that can form on the optic nerve, causing vision loss. 6. Optic nerve glioma: A type of brain tumor that can affect the optic nerve, causing vision loss and other symptoms. Treatment for optic nerve diseases depends on the specific condition and its severity. In some cases, medications or surgery may be used to manage symptoms or slow the progression of the disease. Early detection and treatment are important for preserving vision and preventing further damage to the optic nerve.

Histiocytoma, benign fibrous is a type of benign (non-cancerous) tumor that arises from the histiocytes, which are a type of white blood cell that plays a role in immune function. These tumors are typically found in the skin, but can also occur in other parts of the body, such as the bone, soft tissues, and internal organs. Benign fibrous histiocytomas are usually slow-growing and do not spread to other parts of the body. They are often diagnosed through a combination of physical examination, imaging studies, and biopsy. Treatment for these tumors may involve surgical removal, although in some cases, they may not require any treatment and can be monitored over time.

Nose diseases refer to any medical conditions that affect the structure or function of the nose. These conditions can range from minor irritations to more serious conditions that require medical attention. Some common nose diseases include: 1. Rhinitis: inflammation of the nasal passages, which can be caused by allergies, infections, or other factors. 2. Sinusitis: inflammation of the sinuses, which can cause congestion, facial pain, and other symptoms. 3. Nasal polyps: noncancerous growths in the nasal passages, which can cause blockages and other symptoms. 4. Deviated septum: a misalignment of the nasal septum, which can cause breathing difficulties and other symptoms. 5. Nasal obstruction: blockage of the nasal passages, which can be caused by a variety of factors, including allergies, infections, and structural abnormalities. 6. Nasal cancer: a rare but serious cancer that can develop in the nasal passages or sinuses. 7. Nasal allergies: an immune system response to allergens, such as pollen or dust, that can cause symptoms such as sneezing, runny nose, and congestion. 8. Nasal congestion: blockage or narrowing of the nasal passages, which can be caused by a variety of factors, including allergies, infections, and structural abnormalities. 9. Nasal discharge: the production of mucus or other fluids from the nasal passages, which can be caused by a variety of factors, including infections, allergies, and structural abnormalities. 10. Nasal bleeding: the loss of blood from the nasal passages, which can be caused by a variety of factors, including dry air, nose picking, and certain medical conditions.

Meningioma is a type of benign (non-cancerous) tumor that develops on the meninges, which are the protective membranes that surround the brain and spinal cord. Meningiomas are the most common type of primary brain tumor, accounting for about 30-40% of all brain tumors. Meningiomas can occur anywhere on the meninges, but they are most commonly found on the surface of the brain or along the base of the skull. They can also occur in the spinal canal, where they are called spinal meningiomas. Meningiomas are usually slow-growing and may not cause any symptoms for many years. However, as they grow, they can put pressure on surrounding brain tissue, causing symptoms such as headaches, seizures, vision problems, and changes in personality or behavior. Treatment for meningiomas depends on the size and location of the tumor, as well as the patient's overall health. Small meningiomas that are not causing symptoms may not require treatment and can be monitored with regular imaging studies. Larger tumors or those causing symptoms may be treated with surgery, radiation therapy, or a combination of both.

Fibrous dysplasia, monostotic, is a rare bone disorder that affects only one bone in the body. It occurs when the normal bone tissue is replaced with a mixture of fibrous and abnormal bone tissue, which can cause the bone to weaken and become fragile. This can lead to bone pain, deformities, and an increased risk of fractures. The most commonly affected bones are the femur, tibia, and pelvis, but the disorder can affect any bone in the body. The exact cause of fibrous dysplasia is not known, but it is thought to be related to genetic mutations. Treatment for fibrous dysplasia typically involves managing symptoms and preventing complications, such as fractures. In some cases, surgery may be necessary to repair or replace affected bones.

Neurofibroma, Plexiform is a type of benign tumor that arises from nerve tissue. It is characterized by the proliferation of nerve fibers and Schwann cells, which are cells that wrap around nerve fibers. Plexiform neurofibromas are typically found in the peripheral nervous system, particularly in the arms and legs, and are often associated with the genetic disorder neurofibromatosis type 1 (NF1). These tumors can be painful and may cause nerve compression, leading to symptoms such as numbness, tingling, and weakness. Treatment options for plexiform neurofibromas may include surgery, radiation therapy, and medications to manage pain and other symptoms.

Aneurysmal bone cysts are benign (non-cancerous) bone tumors that occur most commonly in children and young adults. They are characterized by the presence of a fluid-filled sac (cyst) in the bone, which can cause the bone to weaken and become fragile. The cysts are often found in the long bones of the arms and legs, but can also occur in the spine, pelvis, and other bones. Aneurysmal bone cysts are thought to be caused by abnormal blood vessel growth in the bone. The cysts can grow rapidly and cause pain, swelling, and bone deformities. In some cases, the cysts may also cause fractures or other complications. Treatment for aneurysmal bone cysts typically involves draining the fluid from the cyst and then filling the cyst with a substance that helps to stabilize the bone. In some cases, surgery may be necessary to remove the cyst or stabilize the affected bone. The prognosis for aneurysmal bone cysts is generally good, and most people are able to recover fully with appropriate treatment.

In the medical field, "Convergence, Ocular" refers to the ability of the eyes to work together in coordination to focus on an object that is close to the face. This is an important aspect of binocular vision, which allows us to perceive depth and three-dimensional objects. Convergence is achieved through the coordinated movement of the eyes and the muscles that control their movement. When an object is brought closer to the face, the eyes converge by moving them inward towards each other. This is known as convergence or convergence accommodation. Convergence is an important aspect of visual function, and any problems with convergence can lead to visual symptoms such as double vision, eye strain, and difficulty reading or performing other near tasks. In some cases, convergence problems may be caused by underlying medical conditions such as strabismus (crossed eyes) or other eye muscle disorders, or by neurological conditions such as brain injury or stroke. Treatment for convergence problems may involve eye exercises, vision therapy, or surgery, depending on the underlying cause.

A biopsy is a medical procedure in which a small sample of tissue is removed from a person's body for examination under a microscope. The sample is usually taken from a lump, growth, or other abnormal area, and is used to help diagnose a medical condition or disease. There are several types of biopsy procedures, including: 1. Fine-needle aspiration biopsy: A sample of tissue is removed using a thin needle inserted into the abnormal area. 2. Core biopsy: A larger sample of tissue is removed using a hollow needle that takes multiple cores of tissue. 3. Excision biopsy: A larger piece of tissue is removed using a scalpel or other surgical instrument. 4. Endoscopic biopsy: A biopsy is performed using a flexible tube with a camera and light on the end, which is inserted into the body through a natural opening or a small incision. Biopsies are commonly used to diagnose cancer, but they can also be used to diagnose other medical conditions, such as infections, autoimmune diseases, and genetic disorders. The results of a biopsy can help guide treatment decisions and provide important information about a person's prognosis.

Eye infections caused by fungi are a common type of ocular infection. Fungal eye infections can affect the cornea, conjunctiva, or eyelids. Symptoms of fungal eye infections may include redness, itching, burning, discharge, and sensitivity to light. Treatment for fungal eye infections typically involves the use of antifungal medications, such as topical creams or ointments, or oral medications. In severe cases, surgery may be necessary to remove the infected tissue. It is important to seek medical attention if you suspect you have a fungal eye infection, as untreated infections can lead to serious complications, such as vision loss.

Carcinoma, Adenoid Cystic is a type of cancer that originates in the salivary glands, particularly the minor salivary glands located in the mouth, nose, and throat. It is a slow-growing cancer that can spread to nearby tissues and organs, as well as to distant parts of the body through the bloodstream or lymphatic system. The adenoid cystic carcinoma cells are characterized by their ability to invade surrounding tissues and form cysts or nodules. These tumors can be difficult to diagnose and treat because they often do not cause symptoms until they have spread to other parts of the body. Treatment options for adenoid cystic carcinoma may include surgery, radiation therapy, chemotherapy, or a combination of these approaches. The prognosis for this type of cancer depends on several factors, including the stage of the cancer at diagnosis, the location of the tumor, and the patient's overall health.

Decompression, surgical refers to a surgical procedure in which pressure is relieved from a compressed or trapped body part or tissue. This can be done to treat a variety of medical conditions, including: 1. Herniated discs: A herniated disc occurs when the soft tissue inside a spinal disc bulges out through a tear in the outer layer. This can put pressure on the spinal cord or nerves, causing pain, numbness, or weakness. A surgical decompression may be performed to remove the herniated disc material and relieve pressure on the affected nerves. 2. Carpal tunnel syndrome: Carpal tunnel syndrome is a condition in which the median nerve, which runs from the forearm to the hand, becomes compressed or trapped in the wrist. This can cause pain, numbness, or weakness in the hand. A surgical decompression may be performed to release the pressure on the median nerve and relieve symptoms. 3. Sciatica: Sciatica is a type of pain that travels down the leg from the lower back. It can be caused by a herniated disc or other spinal condition that compresses the sciatic nerve. A surgical decompression may be performed to relieve pressure on the sciatic nerve and alleviate symptoms. 4. Tarsal tunnel syndrome: Tarsal tunnel syndrome is a condition in which the posterior tibial nerve, which runs from the calf to the foot, becomes compressed or trapped in the ankle. This can cause pain, numbness, or weakness in the foot. A surgical decompression may be performed to release the pressure on the posterior tibial nerve and relieve symptoms. Surgical decompression is typically performed under general anesthesia and may involve making a small incision in the skin to access the affected area. The surgeon will then use specialized instruments to remove any tissue or bone that is compressing the affected nerve or body part. After the procedure, the incision will be closed with stitches or staples, and the patient will be monitored for any complications.

Exotropia is a medical condition in which the eyes turn outward, away from the nose. It is a type of strabismus, which is a misalignment of the eyes. Exotropia can occur in one or both eyes and can range from mild to severe. It can be caused by a variety of factors, including muscle weakness, nerve damage, or problems with the eye's muscles or bones. Treatment for exotropia may include glasses, patches, eye exercises, or surgery, depending on the severity of the condition.

Optic nerve injuries refer to any damage or trauma that affects the optic nerve, which is the main nerve responsible for transmitting visual information from the retina to the brain. These injuries can result from a variety of causes, including blunt or penetrating trauma to the eye, head or brain, infections, tumors, or other medical conditions. Optic nerve injuries can cause a range of visual symptoms, including loss of vision, decreased visual acuity, double vision, and sensitivity to light. In some cases, optic nerve injuries can be temporary and resolve on their own, while in other cases, they can be permanent and result in significant vision loss or blindness. Treatment for optic nerve injuries depends on the underlying cause and the severity of the injury. In some cases, treatment may involve medications, surgery, or other interventions to address the underlying cause of the injury. In other cases, treatment may focus on managing symptoms and preserving remaining vision.

Lymphoma, B-Cell, Marginal Zone is a type of cancer that affects the lymphatic system, which is a part of the immune system. It is a type of B-cell lymphoma, which means that it starts in the B cells, a type of white blood cell that helps the body fight infections. In marginal zone lymphoma, the cancer cells develop in the marginal zone, which is a part of the lymph node that filters out foreign substances from the blood. This type of lymphoma is usually slow-growing and may not cause symptoms in the early stages. However, as the cancer progresses, it can cause swelling of the lymph nodes, fatigue, fever, and night sweats. Treatment for marginal zone lymphoma may include chemotherapy, radiation therapy, and targeted therapy, which uses drugs to specifically target the cancer cells. The choice of treatment depends on the stage and severity of the cancer, as well as the patient's overall health.

Neurofibromatosis 1 (NF1) is a genetic disorder that affects the development of nerve tissue. It is caused by a mutation in the NF1 gene, which is located on chromosome 17. NF1 is inherited in an autosomal dominant pattern, which means that a person only needs to inherit one copy of the mutated gene from one parent to develop the condition. The symptoms of NF1 can vary widely and may include the development of benign tumors called neurofibromas, which are usually found on the skin and in the nervous system. These tumors can cause pain, discomfort, and cosmetic concerns. Other common symptoms of NF1 include freckling on the skin, learning disabilities, and skeletal abnormalities. In addition to these physical symptoms, people with NF1 may also be at an increased risk of developing certain types of cancer, including glioblastoma, a type of brain tumor, and pheochromocytoma, a type of adrenal gland tumor. There is currently no cure for NF1, but treatment is focused on managing the symptoms and complications of the condition. This may include medications to control pain and seizures, surgery to remove tumors, and physical therapy to address skeletal abnormalities.

In the medical field, "Carnivora" refers to a scientific order of mammals that includes animals that primarily feed on meat. This order includes a diverse range of animals such as dogs, cats, bears, hyenas, and seals. In the context of medicine, the term "Carnivora" may be used to describe the anatomy and physiology of these animals, as well as their behavior and ecology. For example, researchers may study the digestive systems of carnivorous mammals to better understand how they are able to efficiently extract nutrients from their food. Additionally, some diseases and infections are more common in carnivorous mammals than in other types of animals, so veterinarians and researchers may study these animals to better understand the causes and treatments of these conditions.

An abscess is a localized collection of pus that forms in the body as a result of an infection. It is typically caused by bacteria or other microorganisms that enter the body through a wound or other opening, such as a tooth cavity or a surgical incision. The body's immune system responds to the infection by sending white blood cells to the area, which can lead to the formation of an abscess. Abscesses can occur in many different parts of the body, including the skin, muscles, joints, and organs. They can be painful and may cause redness, swelling, and warmth in the affected area. If left untreated, abscesses can become infected and spread to other parts of the body, potentially causing serious complications. Treatment for abscesses typically involves draining the pus and removing any infected tissue. This may be done through a surgical incision or by using a needle to drain the abscess. Antibiotics may also be prescribed to help fight the infection. In some cases, the abscess may recur if the underlying cause of the infection is not treated.

Neurilemmoma, also known as schwannoma, is a type of benign (non-cancerous) tumor that arises from the Schwann cells, which are supportive cells that wrap around nerve fibers. These tumors are most commonly found in the peripheral nerves, which are the nerves that are located outside of the brain and spinal cord. Neurilemmomas can occur anywhere in the body where nerves are present, but they are most commonly found in the head and neck, particularly in the temporal bone, the middle ear, and the jugular foramen (a narrow opening in the skull that contains important nerves and blood vessels). The symptoms of a neurilemmoma depend on the location and size of the tumor, as well as whether it is causing compression of nearby nerves or structures. Common symptoms include pain, numbness, weakness, and tingling in the affected area, as well as hearing loss, balance problems, and difficulty swallowing. Treatment for neurilemmomas typically involves surgical removal of the tumor. In some cases, radiation therapy may be used to shrink the tumor or prevent it from growing back. Because neurilemmomas are usually benign, the prognosis is generally good, and most people who undergo treatment are able to return to their normal activities without any long-term complications.

Nerve compression syndromes are a group of conditions that occur when a nerve is compressed or pinched, leading to pain, numbness, weakness, or other symptoms. These conditions can affect any nerve in the body, but are most commonly seen in the neck, back, and extremities. There are several types of nerve compression syndromes, including carpal tunnel syndrome, cubital tunnel syndrome, radial tunnel syndrome, tarsal tunnel syndrome, and sciatica. These conditions can be caused by a variety of factors, including repetitive motions, poor posture, injury, or underlying medical conditions such as arthritis or diabetes. Treatment for nerve compression syndromes typically involves addressing the underlying cause of the compression, such as through physical therapy, medication, or surgery. In some cases, lifestyle changes such as improving posture or modifying work habits may also be recommended to prevent further compression of the affected nerve.

A granuloma is a type of inflammatory response in which immune cells, such as macrophages and lymphocytes, aggregate to form a mass of tissue. Granulomas are typically characterized by the presence of giant cells, which are formed by the fusion of multiple macrophages. Granulomas can be caused by a variety of factors, including infections, foreign substances, and autoimmune diseases. They are often associated with chronic inflammatory conditions, such as tuberculosis, sarcoidosis, and leprosy. In the medical field, granulomas are often studied as a way to diagnose and treat various diseases. For example, the presence of granulomas in the lungs can be a sign of tuberculosis, while the presence of granulomas in the skin can be a sign of sarcoidosis. Treatment for granulomas depends on the underlying cause and may include medications, surgery, or other therapies.

Eye infections caused by bacteria are a common type of eye infection that can affect people of all ages. These infections can cause a range of symptoms, including redness, swelling, itching, discharge, and sensitivity to light. Bacterial eye infections can affect the surface of the eye (conjunctivitis) or the inside of the eye (endophthalmitis). Conjunctivitis is the most common type of bacterial eye infection and can be caused by a variety of bacteria, including Streptococcus pneumoniae, Haemophilus influenzae, and Staphylococcus aureus. Endophthalmitis is a more serious infection that can cause vision loss and is typically treated with antibiotics administered directly into the eye. Bacterial eye infections are usually treated with antibiotics, which can be taken orally or applied directly to the eye. In some cases, additional treatment may be necessary to manage symptoms or prevent complications. It is important to seek medical attention if you suspect you have a bacterial eye infection, as prompt treatment can help prevent the infection from spreading and reduce the risk of complications.

Nose neoplasms refer to tumors or abnormal growths that develop in the tissues of the nose. These neoplasms can be benign (non-cancerous) or malignant (cancerous). Benign nose neoplasms include nasal polyps, which are non-cancerous growths that develop in the lining of the nasal passages. Other examples of benign nose neoplasms include angiofibromas, which are benign tumors that develop in the blood vessels of the nose and sinuses, and basal cell carcinomas, which are non-cancerous skin growths that can occur on the nose. Malignant nose neoplasms, on the other hand, are cancerous tumors that can develop in any of the tissues of the nose, including the nasal cavity, sinuses, and nasal septum. Examples of malignant nose neoplasms include squamous cell carcinomas, which are the most common type of cancerous nose neoplasm, and adenocarcinomas, which are less common but can be more aggressive. Treatment for nose neoplasms depends on the type and stage of the tumor, as well as the overall health of the patient. Treatment options may include surgery, radiation therapy, chemotherapy, or a combination of these approaches. Early detection and treatment are important for improving outcomes and reducing the risk of complications.

Cephalometry is a medical imaging technique used to measure and analyze the size, shape, and position of the head and facial bones. It involves taking precise measurements of the head and facial bones using X-rays or other imaging technologies. The data obtained from cephalometry is used by dentists, orthodontists, and other medical professionals to diagnose and treat a variety of conditions, including craniofacial abnormalities, sleep disorders, and orthodontic problems. Cephalometry can also be used to evaluate the effectiveness of treatment plans and to monitor changes in the head and facial bones over time.

Drosophila proteins are proteins that are found in the fruit fly Drosophila melanogaster, which is a widely used model organism in genetics and molecular biology research. These proteins have been studied extensively because they share many similarities with human proteins, making them useful for understanding the function and regulation of human genes and proteins. In the medical field, Drosophila proteins are often used as a model for studying human diseases, particularly those that are caused by genetic mutations. By studying the effects of these mutations on Drosophila proteins, researchers can gain insights into the underlying mechanisms of these diseases and potentially identify new therapeutic targets. Drosophila proteins have also been used to study a wide range of biological processes, including development, aging, and neurobiology. For example, researchers have used Drosophila to study the role of specific genes and proteins in the development of the nervous system, as well as the mechanisms underlying age-related diseases such as Alzheimer's and Parkinson's.

Wounds, Nonpenetrating, also known as superficial wounds, are injuries to the skin and underlying tissues that do not penetrate through to the other side of the skin. These types of wounds can be caused by a variety of factors, including cuts, scrapes, burns, and bruises. Nonpenetrating wounds are typically less severe than penetrating wounds, which can damage underlying structures such as bones, muscles, and organs. Treatment for nonpenetrating wounds typically involves cleaning the wound, applying dressings, and monitoring for signs of infection. In some cases, antibiotics may be prescribed to prevent or treat infection.

Contractile proteins are a group of proteins that are responsible for generating force and movement in cells. They are primarily found in muscle cells, but are also present in other types of cells, such as smooth muscle cells and cardiac muscle cells. There are two main types of contractile proteins: actin and myosin. Actin is a globular protein that forms long, thin filaments, while myosin is a thick, rod-shaped protein that also forms filaments. When these two types of proteins interact with each other, they can generate force and movement. In muscle cells, actin and myosin filaments are organized into structures called sarcomeres, which are the basic unit of muscle contraction. When a muscle cell is stimulated to contract, the myosin filaments slide over the actin filaments, causing the sarcomeres to shorten and the muscle cell to contract. Contractile proteins are also involved in other types of cellular movement, such as the movement of organelles within the cell and the movement of cells themselves. They play a critical role in many physiological processes, including muscle contraction, cell division, and the movement of substances across cell membranes.

Soft tissue neoplasms are abnormal growths of cells that develop in the soft tissues of the body, such as the muscles, tendons, ligaments, fat, and blood vessels. These tumors can be benign (non-cancerous) or malignant (cancerous), and they can occur in any part of the body. Soft tissue neoplasms can be further classified based on their cell type, such as fibrous tumors, sarcomas, and leiomyomas. Some common examples of soft tissue neoplasms include lipomas (benign fatty tumors), leiomyomas (benign smooth muscle tumors), and sarcomas (malignant tumors that develop from connective tissue). The diagnosis of soft tissue neoplasms typically involves a combination of physical examination, imaging studies (such as MRI or CT scans), and biopsy (the removal of a small sample of tissue for examination under a microscope). Treatment options for soft tissue neoplasms depend on the type, size, location, and stage of the tumor, as well as the patient's overall health and preferences. They may include surgery, radiation therapy, chemotherapy, or a combination of these approaches.

In the medical field, "neoplasm invasiveness" refers to the ability of a cancerous tumor to invade and spread beyond its original site of origin. This can occur through the bloodstream or lymphatic system, or by direct extension into surrounding tissues. The degree of invasiveness of a neoplasm can be an important factor in determining the prognosis and treatment options for a patient. More invasive tumors are generally considered to be more aggressive and may be more difficult to treat. However, the specific characteristics of the tumor, such as its type, stage, and location, as well as the overall health of the patient, can also play a role in determining the prognosis. Invasive neoplasms may also be referred to as malignant tumors, as they have the potential to spread and cause harm to surrounding tissues and organs. Non-invasive neoplasms, on the other hand, are generally considered to be benign and are less likely to spread.

Lymphoma, Non-Hodgkin (NHL) is a type of cancer that affects the lymphatic system, which is a part of the immune system. NHL is characterized by the abnormal growth of lymphocytes, a type of white blood cell, in the lymph nodes, spleen, and other parts of the body. There are many different types of NHL, and they can vary in their symptoms, progression, and treatment options. Some common symptoms of NHL include swollen lymph nodes, fever, night sweats, weight loss, and fatigue. NHL is typically diagnosed through a combination of physical examination, blood tests, imaging studies, and a biopsy of the affected tissue. Treatment options for NHL may include chemotherapy, radiation therapy, targeted therapy, and stem cell transplantation, depending on the type and stage of the cancer. Overall, NHL is a serious condition that requires prompt diagnosis and treatment to improve outcomes and quality of life for patients.

Lymphoma is a type of cancer that affects the lymphatic system, which is a part of the immune system. It occurs when lymphocytes, a type of white blood cell, grow and divide uncontrollably, forming abnormal masses or tumors in the lymph nodes, spleen, bone marrow, or other parts of the body. There are two main types of lymphoma: Hodgkin lymphoma and non-Hodgkin lymphoma. Hodgkin lymphoma is a less common type of lymphoma that typically affects younger adults and has a better prognosis than non-Hodgkin lymphoma. Non-Hodgkin lymphoma is a more common type of lymphoma that can affect people of all ages and has a wide range of outcomes depending on the specific subtype and the stage of the disease. Symptoms of lymphoma can include swollen lymph nodes, fever, night sweats, weight loss, fatigue, and itching. Diagnosis typically involves a combination of physical examination, blood tests, imaging studies, and a biopsy of the affected tissue. Treatment for lymphoma depends on the subtype, stage, and overall health of the patient. It may include chemotherapy, radiation therapy, targeted therapy, immunotherapy, or a combination of these approaches. In some cases, a stem cell transplant may also be necessary.

In the medical field, "Adaptation, Physiological" refers to the ability of an organism to adjust to changes in its environment or to changes in its internal state in order to maintain homeostasis. This can involve a wide range of physiological processes, such as changes in heart rate, blood pressure, breathing rate, and hormone levels. For example, when a person is exposed to high temperatures, their body may undergo physiological adaptations to help them stay cool. This might include sweating to release heat from the skin, or dilating blood vessels to increase blood flow to the skin and help dissipate heat. Physiological adaptations can also occur in response to changes in an individual's internal state, such as during exercise or when the body is under stress. For example, during exercise, the body may increase its production of oxygen and glucose to meet the increased energy demands of the muscles. Overall, physiological adaptations are a fundamental aspect of how organisms are able to survive and thrive in a changing environment.

Melanoma is a type of skin cancer that begins in the cells that produce the pigment melanin. It is the most dangerous type of skin cancer, as it has the potential to spread to other parts of the body and be difficult to treat. Melanoma can occur in any part of the body, but it most commonly appears on the skin as a new mole or a change in an existing mole. Other signs of melanoma may include a mole that is asymmetrical, has irregular borders, is a different color than the surrounding skin, is larger than a pencil eraser, or has a raised or scaly surface. Melanoma can also occur in the eye, mouth, and other parts of the body, and it is important to see a doctor if you have any concerning changes in your skin or other parts of your body.

In the medical field, "cats" typically refers to Felis catus, which is the scientific name for the domestic cat. Cats are commonly kept as pets and are known for their agility, playful behavior, and affectionate nature. In veterinary medicine, cats are commonly treated for a variety of health conditions, including respiratory infections, urinary tract infections, gastrointestinal issues, and dental problems. Cats can also be used in medical research to study various diseases and conditions, such as cancer, heart disease, and neurological disorders. In some cases, the term "cats" may also refer to a group of animals used in medical research or testing. For example, cats may be used to study the effects of certain drugs or treatments on the immune system or to test new vaccines.

Combined modality therapy (CMT) is a cancer treatment approach that involves using two or more different types of treatments simultaneously or in sequence to achieve a better therapeutic effect than any single treatment alone. The goal of CMT is to increase the effectiveness of cancer treatment while minimizing side effects. The different types of treatments that may be used in CMT include surgery, radiation therapy, chemotherapy, immunotherapy, targeted therapy, and hormonal therapy. The specific combination of treatments used in CMT depends on the type and stage of cancer, as well as the patient's overall health and individual needs. CMT is often used for the treatment of advanced or aggressive cancers, where a single treatment may not be effective. By combining different treatments, CMT can help to destroy cancer cells more completely and prevent the cancer from returning. However, CMT can also have more significant side effects than a single treatment, so it is important for patients to discuss the potential risks and benefits with their healthcare provider before starting treatment.

Biological evolution refers to the process by which species of living organisms change over time through the mechanisms of natural selection, genetic drift, mutation, and gene flow. In the medical field, biological evolution is important because it helps us understand how diseases and pathogens have evolved and adapted to survive in different environments and populations. This knowledge is crucial for developing effective treatments and prevention strategies for infectious diseases, as well as for understanding the genetic basis of inherited diseases and disorders. Additionally, understanding the evolutionary history of organisms can provide insights into their biology, ecology, and behavior, which can inform conservation efforts and the management of natural resources.

In the medical field, computer simulation refers to the use of computer models and algorithms to simulate the behavior of biological systems, medical devices, or clinical procedures. These simulations can be used to study and predict the effects of various medical interventions, such as drug treatments or surgical procedures, on the human body. Computer simulations in medicine can be used for a variety of purposes, including: 1. Training and education: Medical students and professionals can use computer simulations to practice and refine their skills in a safe and controlled environment. 2. Research and development: Researchers can use computer simulations to study the underlying mechanisms of diseases and develop new treatments. 3. Clinical decision-making: Physicians can use computer simulations to predict the outcomes of different treatment options and make more informed decisions about patient care. 4. Device design and testing: Engineers can use computer simulations to design and test medical devices, such as prosthetics or surgical instruments, before they are used in patients. Overall, computer simulations are a powerful tool in the medical field that can help improve patient outcomes, reduce costs, and advance medical knowledge.

In the medical field, a syndrome is a set of symptoms and signs that occur together and suggest the presence of a particular disease or condition. A syndrome is often defined by a specific pattern of symptoms that are not caused by a single underlying disease, but rather by a combination of factors, such as genetic, environmental, or hormonal. For example, Down syndrome is a genetic disorder that is characterized by a specific set of physical and intellectual characteristics, such as a flattened facial profile, short stature, and intellectual disability. Similarly, the flu syndrome is a set of symptoms that occur together, such as fever, cough, sore throat, and body aches, that suggest the presence of an influenza virus infection. Diagnosing a syndrome involves identifying the specific set of symptoms and signs that are present, as well as ruling out other possible causes of those symptoms. Once a syndrome is diagnosed, it can help guide treatment and management of the underlying condition.

An intracranial aneurysm is a bulge or balloon-like dilation of a blood vessel in the brain. It occurs when a weakened area in the wall of the blood vessel balloons out and forms a sac. This can cause the blood vessel to become stretched and prone to rupture, which can lead to a life-threatening brain hemorrhage. Intracranial aneurysms are most commonly found in the arteries that supply blood to the brain, particularly the anterior communicating artery, the middle cerebral artery, and the internal carotid artery. They can occur at any age, but are more common in people over the age of 50. Risk factors for developing an intracranial aneurysm include smoking, high blood pressure, a family history of the condition, and certain genetic disorders. Treatment options for intracranial aneurysms include surgery to clip or coagulate the aneurysm, or endovascular coiling, which involves inserting a catheter through a blood vessel in the groin and threading it up to the aneurysm, where a coil is placed to fill the aneurysm and prevent it from rupturing.

Adipose tissue, also known as body fat or adipose tissue, is a specialized type of connective tissue that is found throughout the body. It is composed of adipocytes, which are cells that store energy in the form of fat. Adipose tissue plays a number of important roles in the body, including insulation, energy storage, and hormone regulation. It is also an important component of the immune system and helps to regulate blood pressure and blood sugar levels. In addition to its physiological functions, adipose tissue also plays a role in the development of certain diseases, such as obesity and type 2 diabetes.

In the medical field, the brain is the most complex and vital organ in the human body. It is responsible for controlling and coordinating all bodily functions, including movement, sensation, thought, emotion, and memory. The brain is located in the skull and is protected by the skull bones and cerebrospinal fluid. The brain is composed of billions of nerve cells, or neurons, which communicate with each other through electrical and chemical signals. These neurons are organized into different regions of the brain, each with its own specific functions. The brain is also divided into two hemispheres, the left and right, which are connected by a bundle of nerve fibers called the corpus callosum. Damage to the brain can result in a wide range of neurological disorders, including stroke, traumatic brain injury, Alzheimer's disease, Parkinson's disease, and epilepsy. Treatment for brain disorders often involves medications, surgery, and rehabilitation therapies to help restore function and improve quality of life.

Actins are a family of globular, cytoskeletal proteins that are essential for the maintenance of cell shape and motility. They are found in all eukaryotic cells and are involved in a wide range of cellular processes, including cell division, muscle contraction, and intracellular transport. Actins are composed of two globular domains, the N-terminal and C-terminal domains, which are connected by a flexible linker region. They are capable of polymerizing into long, filamentous structures called actin filaments, which are the main component of the cytoskeleton. Actin filaments are dynamic structures that can be rapidly assembled and disassembled in response to changes in the cellular environment. They are involved in a variety of cellular processes, including the formation of cellular structures such as the cell membrane, the cytoplasmic cortex, and the contractile ring during cell division. In addition to their role in maintaining cell shape and motility, actins are also involved in a number of other cellular processes, including the regulation of cell signaling, the organization of the cytoplasm, and the movement of organelles within the cell.

Brain neoplasms, also known as brain tumors, are abnormal growths of cells in the brain. They can be either benign (non-cancerous) or malignant (cancerous). Brain tumors can occur in any part of the brain and can be primary (originating from brain cells) or secondary (spreading from other parts of the body to the brain). Symptoms of brain neoplasms can vary depending on the location and size of the tumor, but may include headaches, seizures, changes in vision or hearing, difficulty with balance or coordination, and changes in personality or behavior. Diagnosis of brain neoplasms typically involves a combination of imaging tests such as MRI or CT scans, as well as a biopsy to confirm the presence of cancer cells. Treatment options for brain neoplasms may include surgery, radiation therapy, chemotherapy, or a combination of these approaches. The specific treatment plan will depend on the type, location, and stage of the tumor, as well as the overall health of the patient.

Biomechanical phenomena refer to the study of the mechanical properties and behavior of living organisms, particularly in relation to movement and function. In the medical field, biomechanical phenomena are often studied in the context of musculoskeletal disorders, sports injuries, and rehabilitation. This involves analyzing the forces and movements involved in various activities, such as walking, running, or lifting, and how they affect the body's tissues and structures. Biomechanical engineers and researchers use a variety of techniques, including computer simulations, imaging technologies, and physical measurements, to study biomechanical phenomena and develop new treatments and interventions for a range of medical conditions.

Neoplasm recurrence, local refers to the return of cancer cells to the original site of the tumor after treatment. This can occur even if the cancer has been completely removed through surgery or other treatments. Local recurrence is typically treated with additional surgery, radiation therapy, or chemotherapy, depending on the type and stage of the cancer. It is important to note that local recurrence does not necessarily mean that the cancer has spread to other parts of the body.

In the medical field, the centrosome is a cellular organelle that plays a crucial role in cell division and the organization of microtubules. It is composed of two centrioles surrounded by a protein matrix called the pericentriolar material (PCM). The centrosome is responsible for organizing the microtubules that make up the mitotic spindle, which is essential for the separation of chromosomes during cell division. The centrosome also plays a role in the organization of the cytoskeleton, which provides structural support for the cell and helps to maintain its shape. Abnormalities in the structure or function of the centrosome can lead to a variety of diseases, including cancer. For example, mutations in genes that regulate centrosome function have been linked to the development of certain types of cancer, such as ovarian cancer and glioblastoma.

Tubulin is a protein that is essential for the formation and maintenance of microtubules, which are structural components of cells. Microtubules play a crucial role in a variety of cellular processes, including cell division, intracellular transport, and the maintenance of cell shape. In the medical field, tubulin is of particular interest because it is a key target for many anti-cancer drugs. These drugs, known as tubulin inhibitors, work by disrupting the formation of microtubules, which can lead to cell death. Examples of tubulin inhibitors include paclitaxel (Taxol) and vinblastine. Tubulin is also involved in the development of other diseases, such as neurodegenerative disorders like Alzheimer's and Parkinson's disease. In these conditions, abnormal tubulin dynamics have been implicated in the formation of neurofibrillary tangles and other pathological hallmarks of the diseases. Overall, tubulin is a critical protein in cell biology and has important implications for the development of new treatments for a variety of diseases.

Once in orbit, their speed keeps them in orbit above the atmosphere. If e.g., an elliptical orbit dips into dense air, the ... The gravity of the orbiting object raises tidal bulges in the primary, and since below the synchronous orbit, the orbiting ... Free drift Klemperer rosette List of orbits Molniya orbit Orbit determination Orbital spaceflight Perifocal coordinate system ... such as orbits close to the Sun). Low Earth orbit (LEO): Geocentric orbits with altitudes up to 2,000 km (0-1,240 miles). ...
A line-based orbit trap colours a point based upon how close a function's orbit comes to one or more lines, typically vertical ... A point-based orbit trap colours a point based upon how close a function's orbit comes to a single point, typically the origin ... In mathematics, an orbit trap is a method of colouring fractal images based upon how close an iterative function, used to ... Orbit traps are typically used with the class of two-dimensional fractals based on an iterative function. A program that ...
Subsynchronous orbit Supersynchronous orbit Graveyard orbit Tidal locking (synchronous rotation) Sun-synchronous orbit List of ... A synchronous orbit is an orbit in which an orbiting body (usually a satellite) has a period equal to the average rotational ... A synchronous orbit is an orbit in which the orbiting object (for example, an artificial satellite or a moon) takes the same ... For synchronous satellites orbiting Earth, this is also known as a geostationary orbit. However, a synchronous orbit need not ...
Orbit started as the 9/4 favourite for the Eclipse Stakes and in the final 100 yards of the race Orbit gradually edged away ... Friar's Balsam started as the 1/3 favourite for the race, with Ayrshire at 100/12 and Orbit at 100/8. Orbit ran on well in the ... "Bend Or - Orbit". Tbheritage.com. Retrieved 2012-09-09. "Dollar - Old Man". Tbheritage.com. Retrieved 2012-09-09. "Orbit ... Orbit was the son of Epsom Derby and Champion Stakes winner Bend Or. His dam was Fair Alice, a daughter of July Stakes winner ...
The microcosmic orbit (小周天), also known as the Self Winding Wheel of the Law, is a Taoist qigong energy cultivation technique. ... The microcosmic orbit should be viewed in the context of a variety of Taoist exercises and techniques designed to purify the ... The history of the microcosmic orbit dates back to prehistoric times in China, and the underlying principles can be found in ... The clear understanding of the microcosmic orbit technique is very important not only because of its historical context in the ...
In 2009 Orbit Homes, the development and sales arm of the Orbit Group was formed. Orbit Homes build in excess of 1,000 new ... "Orbit Group - What we do". www.orbit.org.uk. Archived from the original on 21 December 2008. "Orbit Group - Our History". www. ... In October 2007 Orbit Bexley and Thanet Community were merged to form Orbit South. Orbit is active in promoting shared ... "Baroness Blackstone announced as future Orbit Chair". Orbit Group. Archived from the original on 24 December 2012. "Orbit Group ...
... may refer to: In Orbit (September album) In Orbit (Clark Terry album) In Orbit, an album by The Stomachmouths In Orbit ... an album by Sun Araw In Orbit, 1967 novel by Wright Morris Orbit (disambiguation) This disambiguation page lists articles ... associated with the title In Orbit. If an internal link led you here, you may wish to change the link to point directly to the ...
"Biography: Orbit Culture". Spirit of Metal webzine. Official website Orbit Culture on Twitter Orbit Culture at AllMusic Orbit ... "Orbit Culture: Exklusive Premiere von 'Open Eye'". Metal Hammer. 2 July 2020. "ORBIT CULTURE Drops The Riffs On New Song "Mute ... "Meet Orbit Culture, Small-Town Swedes With Grand Vision Inspired by Metallica, Gojira". Revolver Magazine. 5 May 2020. "Orbit ... "Orbit Culture Unveil Finale to Three-Part Video Series, "The Shadowing"". MetalSucks. 14 April 2020. "CD Reviews- Nija Orbit ...
A stationary orbit is sometimes referred to as a "fixed orbit". Around the Earth, stationary satellites orbit at altitudes of ... An areostationary orbit or areosynchronous equatorial orbit (abbreviated AEO) is a circular areo-synchronous orbit in the ... In celestial mechanics, the term stationary orbit refers to an orbit around a planet or moon where the orbiting satellite or ... Areo-stationary orbit is a concept similar to Earth's geo-stationary orbit. The prefix areo- derives from Ares, the ancient ...
If for one to two wins a GIF of Orbit holding a variant of the Flag of Texas will be shown, for three wins or more a short GIF ... Orbit returned on November 2, 2012, at the unveiling of the Astros new look for their 2013 debut in the American League. The ... Orbit is the name given to Major League Baseball's Houston Astros mascot, a lime-green alien wearing an Astros jersey with ... Orbit was replaced with Junction Jack beginning in the 2000 season, with the team's move from the Astrodome to then Enron Field ...
The ArcelorMittal Orbit (often referred to as the Orbit Tower or its original name, Orbit) is a 114.5-metre (376-foot) ... Official website Orbit Anish Kapoor website The ArcelorMittal Orbit Greater London Authority 360 degree view of the Orbit ... ArcelorMittal Orbit brochure, page 14 ArcelorMittal Orbit brochure, cover ArcelorMittal Orbit brochure, page 7 "ArcelorMittal ... "The Slide , New For 2016 , ArcelorMittal Orbit". ArcelorMittal Orbit. Retrieved 14 April 2017. "Olympic Park Orbit tower slide ...
... announced, Joao. "ZTE Orbit announced". NFC-Phones.org. Archived from the original on 11 February 2017. Retrieved 10 ... The Orbit was also announced as one of the launch devices for the Windows Phone platform in China alongside the HTC Titan and a ... The ZTE Orbit (also known as the ZTE Render) is a budget smartphone developed by ZTE that runs Microsoft's Windows Phone 7.5 ... The Orbit is the first Windows Phone device to include near field communication. In late September 2012 it was announced a CDMA ...
In mathematics, orbit capacity of a subset of a topological dynamical system may be thought of heuristically as a "topological ... More precisely, its value for a set is a tight upper bound for the normalized number of visits of orbits in this set. A ... Lindenstrauss introduced the definition of orbit capacity: ocap ⁡ ( E ) = lim n → ∞ sup x ∈ X 1 n ∑ k = 0 n − 1 χ E ( T k x ... It is not a true measure, it is only sub-additive: Orbit capacity is sub-additive: ocap ⁡ ( A ∪ B ) ≤ ocap ⁡ ( A ) + ocap ⁡ ( B ...
In astronomy, lunar orbit (also known as a selenocentric orbit) is the orbit of an object around the Moon. As used in the space ... Cislunar space List of orbits Orbital mechanics Distant retrograde orbit Near-rectilinear halo orbit Woods, W.D. (2008). " ... is the adjustment to achieve lunar orbit, as undertaken by Apollo spacecraft for example. Low lunar orbit (LLO) are orbits ... The first orbit was an elliptical orbit, with an apolune of 1,008 nautical miles (1,867 km; 1,160 mi) and a perilune of 102.1 ...
"New Orbit" - 2:59 "Paradox X" - 4:31 "Orbit 2" - 3:39 "Chi" - 7:50 "Orbit 3" - 2:23 "U Feature" - 3:56 "Syntax" - 7:16 "Maze ... New Orbit review at Pitchfork Johnson, Andrew. New Orbit review at PopMatters (Articles with short description, Short ... New Orbit is an album by American jazz pianist Matthew Shipp recorded in 2000 and released on Thirsty Ear's Blue Series. Shipp ... Matthew Shipp - New Orbit: Review at AllMusic. Retrieved October 20, 2014. Cook, Richard; Brian Morton (2002). The Penguin ...
Maneuvering into a large circular orbit, e.g. a geostationary orbit, requires a larger delta-v than an escape orbit, although ... A circular orbit is an orbit with a fixed distance around the barycenter; that is, in the shape of a circle. In this case, not ... This orbit has no radial version. Listed below is a circular orbit in astrodynamics or celestial mechanics under standard ... It is also a matter of maneuvering into the orbit. See also Hohmann transfer orbit. In Schwarzschild metric, the orbital ...
... orbit Low Earth orbit Medium Earth orbit Molniya orbit Subsynchronous orbit Supersynchronous orbit Synchronous orbit Howell, ... 122 Spaceflight portal Geostationary orbit Geosynchronous satellite Graveyard orbit High Earth orbit List of orbits List of ... Satellites currently in Geosynchronous Orbit, list updated daily Science@NASA - Geosynchronous Orbit NASA - Planetary Orbits ... 157 Many objects in geosynchronous orbits have eccentric and/or inclined orbits. Eccentricity makes the orbit elliptical and ...
Comparison of Tundra orbit, QZSS orbit and Molniya orbit - equatorial view Elliptic orbit List of orbits Molniya orbit ... is called a Supertundra orbit. The exact height of a satellite in a Tundra orbit varies between missions, but a typical orbit ... Tundra and Molniya orbits are used to provide high-latitude users with higher elevation angles than a geostationary orbit. This ... In 2017 the ESA Space Debris office released a paper proposing that a Tundra-like orbit be used as a disposal orbit for old ...
... also accelerates downloads by acting as a peer-to-peer client, utilizing bandwidth of other users. Orbit ... Orbit Downloader supports Internet Explorer, Maxthon, Mozilla Firefox and Opera web browsers. Although Orbit Downloader is free ... "Orbit Downloader". Download.com. CBS Interactive. Retrieved 28 December 2017. Thornton, Bob (23 August 2013). "Orbit Downloader ... Williams, Mike (23 August 2013). "Orbit Downloader includes DDoS code, says ESET". Betanews. "Orbit Downloader 4.0.0.6". ...
... may refer to: the orbit of Mars around the Sun an areocentric orbit, orbit of an object around Mars an ... areostationary orbit an areosynchronous orbit Venusian orbit (disambiguation) Terrestrial orbit (disambiguation) This ... disambiguation page lists articles associated with the title Martian orbit. If an internal link led you here, you may wish to ...
A transatmospheric orbit (TAO) is an orbit around a celestial body in which the perigee of the orbit intersects with the ... It was launched into a 76 km x 416 km orbit (47 mi x 258 mi) transatmospheric orbit. Boeing Starliner spacecraft is placed in a ... Transatmospheric orbits have limited practical applications because objects placed into such orbits are subject to rapid ... Articles with short description, Short description matches Wikidata, Earth orbits, Orbits). ...
"Virgin Orbit Selected to Bring Orbital Launch Capabilities to Brazil". Virgin Orbit. April 28, 2021. "Virgin Orbit Formally ... LauncherOne became the first Virgin Orbit vehicle to reach orbit, successfully deploying 10 CubeSats into Low Earth Orbit for ... At that time Orbit was about to start testing its Cosmic Girl launch platform. A few months prior to going public, Virgin Orbit ... Virgin Orbit's first and only UK launch took place on January 9, 2023. The rocket failed to reach orbit. In April 2021, the ...
... a heteroclinic orbit can be understood as the transition from one periodic orbit to another. By contrast, a homoclinic orbit ... A heteroclinic orbit is then the joining of two distinct periodic orbits. It may be written as p ω s 1 s 2 ⋯ s n q ω {\ ... the orbit would simply be p ω {\displaystyle p^{\omega }} . Heteroclinic orbit Homoclinic bifurcation Ott, Edward (1994). Chaos ... in this case the homoclinic orbit is called twisted. Homoclinic orbits and homoclinic points are defined in the same way for ...
... is a 2021 LGBT space opera novel, the debut novel by Everina Maxwell. After Prince Taam of Iskat dies ... Course of Honor was not fanfiction, but adhered to certain genre conventions which remain present in Winter's Orbit. The novel ... Em Nordling (3 March 2021). "Queer Romance and Political Intrigue in Winter's Orbit by Everina Maxwell". Tor.com. Retrieved 29 ... Liz Bourke (29 January 2021). "Liz Bourke Reviews Winter's Orbit by Everina Maxwell". Locus. Retrieved 29 June 2021. "Sci-Fi/ ...
Team Orbit: A group of 100 Cartoon Orbit users who were chosen to make suggestions about the game after it was released to the ... cZone: The part of the Cartoon Orbit site that belonged to the user. They could decorate their cZone with any of Orbit's cards ... "We regret to announce that Cartoon Orbit will be closing October 16, 2006. Since the launch of Cartoon Orbit in 2000, we have ... Massive Cartoon Orbit Archival Project, a collaboration of information surrounding Cartoon Orbit (Articles with short ...
In 1991, Orbit Semiconductor underwent a management buy-out (MBO) by Gary P. Kennedy and his associates. In 1992, Orbit ... Orbit Semiconductor successfully underwent an initial public offering (IPO) in 1994, trading as ORB on NASDAQ. In 1998, Orbit ... Orbit Semiconductor has proprietary gate-array technology delivering a flexible response at low cost. Orbit Semiconductor was ... the Orbit team became independent. "Orbit Semiconductor Inc". www.ibselectronics.com. Retrieved 2021-03-17. News, Bloomberg ...
... expands the game to include zero-G adventuring, from geosynchronous orbit to the surface of the Moon, which is the ... Near Orbit was reviewed in Space Gamer/Fantasy Gamer No. 88. The reviewer commented that "Overall, the strengths of the ... Near Orbit is a 1989 role-playing game supplement published by R. Talsorian Games for Cyberpunk. ...
... has an orbit that is a conic section (i.e. circular orbit, elliptic orbit, parabolic trajectory, hyperbolic trajectory, or ... In astrodynamics, an orbit equation defines the path of orbiting body m 2 {\displaystyle m_{2}\,\!} around central body m 1 {\ ... For a given orbit, the larger μ {\displaystyle \mu } , the faster the orbiting body moves in it: twice as fast if the ... The parameter e {\displaystyle e} is the eccentricity of the orbit, and is given by e = 1 + 2 E ℓ 2 m 3 μ 2 {\displaystyle e={\ ...
Blu-ray First Orbit - the project's web page First Orbit on YouTube - the global premiere channel for the film First Orbit at ... "Yuri First Orbit - Embassies to Back Yards". Archived from the original on 30 July 2012. Retrieved 20 April 2011. First Orbit A ... This UK filmmaker is crowdfunding the DVD release of his First Orbit YouTube hit Internet hit First Orbit to be released on DVD ... Calls to Translate First Orbit. Independent Movie First Orbit Goes Super Multi-Lingual with the help of IndieGoGo. ...
orbit number at epoch: 13015. The dashed part of the orbit path shows where the satellite is in the earths shadow, Follow @ ... The orbit data is extracted from the following two-line orbital elements, ...
orbit number at epoch: 7194. The dashed part of the orbit path shows where the satellite is in the earths shadow, Follow @ ... The orbit data is extracted from the following two-line orbital elements, ...
... orbits: low Earth orbit (LEO), medium Earth orbit (MEO), and geostationary or geosynchronous orbit (GEO). LEO satellites are ... Other articles where medium earth orbit is discussed: satellite communication: How satellites work: … ... orbits: low Earth orbit (LEO), medium Earth orbit (MEO), and geostationary or geosynchronous orbit (GEO). LEO satellites are ...
Most satellites travel in low Earth orbit; here we explain how and why they do so. ... Low Earth orbit theory. Orbits are possible due to the force of gravity - the same force that holds us to the surface of the ... When a satellite reaches orbital speed, it is officially in orbit.. Satellites in low Earth orbit. The orbital speed of 7.8 km/ ... In very simple terms, low Earth orbit (LEO) is exactly what it sounds like: An orbit around the Earth with an altitude that ...
Then on 4 May, the Progress ship docked to the station fired its engines for 6.5 minutes to boost the stations orbit by 2.7 ... Several failures on the International Space Station in recent weeks have left the orbiting outpost with fewer altitude-boosting ... Such manoeuvres are periodically necessary because the stations orbit degrades over time. ... can only be sent when the ISS is in contact with Russian ground stations and it is out of range for six out of its 16 orbits ...
... scan of the orbit is an imaging method. It uses x-rays to create detailed pictures of the eye sockets (orbits), eyes and ... Orbit. In: Haaga JR, Boll DT, eds. CT and MRI of the Whole Body. 6th ed. Philadelphia, PA: Elsevier; 2017:chap 20. ... A computed tomography (CT) scan of the orbit is an imaging method. It uses x-rays to create detailed pictures of the eye ... Orbit. In: Salmon JF, ed. Kanskis Clinical Ophthalmology. 9th ed. Philadelphia, PA: Elsevier; 2020:chap 4. ...
Hunting LightSail in Orbit. The hunt is on in the satellite tracking community, as the U.S. Air Forces super-secret X-37B ... A capture of the X-37B in orbit. Image credit and copyright: Luke (Catching up). Theres also been word afoot that future X-37B ... "By then, the orbit will be visible from the northern hemisphere during the middle of the night. The southern hemisphere may ... This marks the start of OTV-4, the X-37Bs fourth trip into low Earth orbit. And though NORAD wont be publishing the orbital ...
Message boards : SETI@home Science : Water Found in Hot Planets Orbit. Message board moderation To post messages, you must log ... Message boards : SETI@home Science : Water Found in Hot Planets Orbit. ©2023 University of California SETI@home and Astropulse ... Water Found in Hot Planets Orbit. Btw while I was investigating other links from this news story I came across what could be a ... Water Found in Hot Planets Orbit. Btw while I was investigating other links from this news story I came across what could be a ...
"William Orbit - William / Orbit". Discogs.com. Retrieved 16 December 2019.. *^ "William Orbit , Charts & Awards , Billboard ... "Discography William Orbit". Australian-Charts.com. Retrieved 29 April 2011.. *^ "William Orbit , Charts & Awards , Billboard ... William / Orbit (2002, Universal) - U.S. two-disc publishing CD set to support William Orbits publishing catalogue[30] ... William Orbit featuring Beth Orton) 59 - - Strange Cargo III 1999 "Barbers Adagio for Strings" 4 23 13 Pieces in a Modern ...
A Long March 4C lifts off from Jiuquan to send Yaogan-34 into orbit. (Image credit: CASC). The Long March 4C rocket lifted off ... China launches more classified Yaogan satellites into orbit. News By Andrew Jones ... The Yaogan-30 (08) triplets join seven previous groups in orbit which have been launched since 2017. ...
Virgin Orbit has announced that it has joined a new consortium to design and carry out the worlds first dedicated commercial ... "Virgin Orbit is thrilled to join this consortium, as it speaks directly to our mantra of opening space for everyone," said ... "We have already seen the incredible utility of small satellites here in Earth Orbit, and were thrilled to start providing ... The mission will fly on Virgin Orbits LauncherOne rocket, a responsive air-launch platform capable of operating from ...
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An orbit is actually composed of two motions: one directly toward the other body (planet or star...) and the another that ... Planets in our solar system follow an orbit around the Sun, as first noted by Johannes Kepler, in the shape of an ellipse. ... Orbits. Orbits. The motion of a massive body around another body, governed by the force of gravity. Planets in our solar system ... An orbit is actually composed of two motions: one directly toward the other body (planet or star...) and the another that ...
Felix Sater has enjoyed one of the strangest trajectories of any Russian satellite in the presidents orbit. From jailed Wall ...
At his recent Fam 1st Family Foundation community barbecue in Oakland, Calif., Beast Mode twice blasted a ball into orbit ... Marshawn Lynch boots ball into orbit during kickball match Published: Jul 12, 2015 at 09:08 AM ...
"The classes are defined by the orbits geometric and algebraic symmetries. In each class we present a few orbits initial ... In general, orbits described by the three-body problem are non-periodic, i.e. chaotic, and are rather sensitive to initial ... "A topological method is used to classify periodic three-body orbits into families, which fall into four classes, with all three ... Due to this, it is also difficult to find periodic orbits of three-body systems by means of numerical methods. ...
A navigation team animation showing Cassinis final 22 orbits at Saturn in 2017, beginning with the Titan flyby on 22 April ... A navigation team animation showing Cassinis final 22 orbits at Saturn in 2017, beginning with the Titan flyby on 22 April ...
In the first week of August the Chinese Space Plane completed its second successful launch and is still in orbit The first ... The Chinese appear to have done the same during their two days in orbit. The latest X-37B in orbit was reported to be carrying ... The Chinese UOV remained in a 350-kilometer-high orbit for over 40 hours on its first flight and is using a similar orbit ... The X-37B has been doing this for over a decade now, going into orbit for the first time in April 2010, and remaining up there ...
... to slip between two of Saturns rings and then thrust into the planets field of gravity in a maneuver called the Saturn Orbit ... The burn refers to an hour and a half of engine power Cassini will use to position itself properly into Saturns orbit. ... Foust, who said the engine burn is critical for Cassini to enter orbit and avoid flying right past Saturn, reported that ... If Cassini-Huygens can successfully shoot itself into Saturns orbit as planned, the craft will sail approximately 12,427 miles ...
The orbit, which protects, supports, and maximizes the function of the eye, is shaped like a quadrilateral pyramid, with its ... The floor is two-thirds the depth of the orbit. The average dimensions of the orbit are as follows:. * Height of orbital margin ... Innervation of the Orbit. The innervation of the orbit can be divided into 4 functional components: general somatic efferent ( ... Coronal computed tomography (CT) scan of the orbits of a 35-year-old woman that demonstrates a mass in the left orbit that ...
Virgin Orbit plans to launch small satellites from a rocket released by a customized Boeing 747. It has another site in ... Payloads will weigh up to 450 kilograms (1,000 pounds) and orbit the equator at an altitude of about 500 kilometers (310 miles ...
Google Nexus Orbit Console. The first console by Google..Innovation and design delivering the best of google experience with ... Google Nexus Orbit Console. The first console by Google..Innovation and design delivering the best of google experience with ... Google glass Orbit (gaming) for players to connect with their console, receive notifications, messages or other is easy! IPM ... Google glass Orbit (gaming) for players to connect with their console, receive notifications, messages or other is easy! IPM ...
Faint star orbiting the Big Dippers Alcor discovered. Date:. December 10, 2009. Source:. American Museum of Natural History. ... "Faint star orbiting the Big Dippers Alcor discovered." ScienceDaily. www.sciencedaily.com. /. releases. /. 2009. /. 12. /. ... Over one year, the Alcor pair moves in an ellipse on the sky about 0.08 arc seconds in width because of the Earths orbit ... "We used a brand new technique for determining that an object orbits a nearby star, a technique thats a nice nod to Galileo," ...
Why Orbit Baby?. Why Orbit Baby? The brand thats been called "game changing", "magical" and "the Rolls Royce of car seats and ...
Buy Uptown In Orbit (CD) by Emmet Cohen (CD $19.98). Amoeba Music. Ships Free in the U.S. ...
Then, all of this rocks would find his orbit radius, depending of them velocities. So, the fastest ones, will orbit much ... For instance, if you want to go to Mars, what they do first is they get into orbit, 7.6 km/s and then from there on do another ... Real rockets dont go that fast, they just get around 27,000 kmph to get into orbit, which is just around 7.6 km/s. That is the ... How would you calculate the speed for an elliptical orbit?. Answer. Button navigates to signup page. •. Comment. Button ...
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The way the hands on the Orbits Clock move is out of this world. Designed by Studio Ve, the carbon fiber wall clock features ... The Orbits Clock has a "light and airy feeling" space enthusiasts will love. The atom-like design lends a futuristic vibe to ... The Orbits Clock by Studio Ve Features Rotating Loops to Tell Time. Alyson Wyers - January 6, 2015 - Art & Design ... The way the hands on the Orbits Clock move is out of this world. Designed by Studio Ve, the carbon fiber wall clock features ...
About 300 kilometers above geosynchronous orbit is the "graveyard orbit" (aka "disposal orbit" and "junk orbit"). This is where ... The new orbit (the Transfer Orbit) is shown in green. The most important type of transfer orbit is called a Hohmann, but there ... An equatorial orbit is a non-inclined orbit with respect to Terras equator (i.e., the orbit has zero inclination to the ... Terras orbit is in light blue. The astronomical body being orbited is Sol. The orbit has a periapsis at point PA, and an ...
SMART-1 Osculating Orbit up to 09.01.05. Date: 08 January 2005. Satellite: SMART-1. Depicts: SMART-1 osculating orbit. ... The diagram shows the SMART-1 osculating orbit at several dates during the spiralling in to the final operational orbit. On 9 ... ESA Science & Technology - SMART-1 Osculating Orbit up to 09.01.05. * Missions * Show All Missions ...
  • To a close approximation, planets and satellites follow elliptic orbits, with the center of mass being orbited at a focal point of the ellipse, as described by Kepler's laws of planetary motion. (wikipedia.org)
  • Most satellites travel in low Earth orbit. (space.com)
  • Most satellites have near-circular orbits, but in a few cases the ellipse can be much more elongated, with a major axis much longer than the minor axis. (space.com)
  • EDT Thursday (1811 GMT, May 6, or 2:11 a.m. local time May 7), sending the eighth trio of Yaogan-30 satellites into a 370-mile-altitude (600 kilometers) orbit. (livescience.com)
  • We have already seen the incredible utility of small satellites here in Earth Orbit, and we're thrilled to start providing dedicated launches to deep space. (virgin.com)
  • By incorporating a third rocket stage with the existing LauncherOne design, Virgin Orbit can launch satellites into a trajectory to Mars. (virgin.com)
  • Virgin Orbit plans to launch small satellites from a rocket released by a customized Boeing 747. (foxbusiness.com)
  • The Yaogan-30 (08) triplets join seven previous groups in orbit which have been launched since 2017. (livescience.com)
  • A navigation team animation showing Cassini's final 22 orbits at Saturn in 2017, beginning with the Titan flyby on 22 April 2017 that moves Cassini's periapsis from just outside the F ring to the region between Saturn's D ring and the cloud tops of Saturn. (planetary.org)
  • Each subsequent launch (March 2011, December 2012, May 2016 and September 2017) kept the X-37B in orbit longer (225 days then 469, 675, 718 and over 800). (strategypage.com)
  • Over one year, the Alcor pair moves in an ellipse on the sky about 0.08 arc seconds in width because of the Earth's orbit around the Sun. This amount of motion, 0.08 arcsec, is about 1,000 times smaller than the eye can discern, but a fraction of this motion was easily measured by the Project 1640 scientists. (sciencedaily.com)
  • Virgin Orbit has announced that it has joined a new consortium to design and carry out the world's first dedicated commercial small satellite missions to Mars. (virgin.com)
  • Virgin Orbit is thrilled to join this consortium, as it speaks directly to our mantra of 'opening space for everyone'," said Virgin Orbit's vice president of business development Stephen Eisele. (virgin.com)
  • Head over to Virgin Orbit to find out more. (virgin.com)
  • orbits: low Earth orbit (LEO), medium Earth orbit (MEO), and geostationary or geosynchronous orbit (GEO). (britannica.com)
  • There is, however, one particular high-altitude orbit that's worth the extra effort to get to - and that's Geosynchronous orbit (GEO). (space.com)
  • The superficial bony orbit is defined by the orbital margin, which is rectangular with rounded corners. (medscape.com)
  • Introduction to Eye Socket Disorders The eye sockets (orbits) are bony cavities that contain and protect the eyes and their supporting structures (see figures An Inside Look at the Eye and Structures That Protect the Eye). (msdmanuals.com)
  • In order to remain in this orbit, a satellite has to travel at around 17,500 miles per hour (7.8 kilometers per second), at which speed it takes around 90 minutes to complete an orbit of the planet. (space.com)
  • Payloads will weigh up to 450 kilograms (1,000 pounds) and orbit the equator at an altitude of about 500 kilometers (310 miles). (foxbusiness.com)
  • It uses x-rays to create detailed pictures of the eye sockets (orbits), eyes and surrounding bones. (medlineplus.gov)
  • Satellite orbits usually follow an oval-type path called an ellipse, the length and width of which are known as the major and minor axes. (space.com)
  • When these two axes are equal in size, the orbit is a perfect circle, which is just a special case of an ellipse. (space.com)
  • Planets in our solar system follow an orbit around the Sun, as first noted by Johannes Kepler, in the shape of an ellipse. (stardate.org)
  • In very simple terms, low Earth orbit (LEO) is exactly what it sounds like: An orbit around the Earth with an altitude that lies towards the lower end of the range of possible orbits. (space.com)
  • However GEO is at an altitude of around 22,000 miles (36,000 km), at which point the orbital speed has slowed, so a single orbit corresponds to precisely one rotation of the Earth. (space.com)
  • Several failures on the International Space Station in recent weeks have left the orbiting outpost with fewer altitude-boosting options. (newscientist.com)
  • The collection of articles provides more than 550 dose measurements for spacecraft and extra-vehicular activity in 42 combinations of inclination and altitude in low Earth orbit. (cdc.gov)
  • In celestial mechanics, an orbit (also known as orbital revolution) is the curved trajectory of an object such as the trajectory of a planet around a star, or of a natural satellite around a planet, or of an artificial satellite around an object or position in space such as a planet, moon, asteroid, or Lagrange point. (wikipedia.org)
  • Normally, orbit refers to a regularly repeating trajectory, although it may also refer to a non-repeating trajectory. (wikipedia.org)
  • The Orbit Dinnerware Collection draws inspiration from the angled trajectory of a planet in orbit. (macys.com)
  • First, he found that the orbits of the planets in our Solar System are elliptical, not circular (or epicyclic), as had previously been believed, and that the Sun is not located at the center of the orbits, but rather at one focus. (wikipedia.org)
  • How would you calculate the speed for an elliptical orbit? (khanacademy.org)
  • Isaac Newton demonstrated that Kepler's laws were derivable from his theory of gravitation and that, in general, the orbits of bodies subject to gravity were conic sections (this assumes that the force of gravity propagates instantaneously). (wikipedia.org)
  • Isaac Newton's three-body problem, which examines how three bodies affected by gravitation will orbit around each other, is well known in nonlinear dynamics and applied mathematics. (eurekalert.org)
  • Previous OTV missions were placed in a 40 to 43.5 degree inclination orbit, and the current NOTAMs cite a 61 degree azimuth angle for today's launch out of the Cape which suggests a slightly shallower 39 degree orbit. (universetoday.com)
  • What is low Earth orbit? (space.com)
  • A satellite in LEO completes around 16 orbits every day, or for every complete rotation of the Earth itself. (space.com)
  • This marks the start of OTV-4 , the X-37B's fourth trip into low Earth orbit. (universetoday.com)
  • About the size of a loaf of bread and the result of a successful Kickstarter campaign , LightSail is set to demonstrate key technologies in low Earth orbit before the Planetary Society's main solar sail demonstrator takes to space in 2016. (universetoday.com)
  • In his book "Philosophiæ Naturalis Principia Mathematica," published more than three centuries ago, Newton used the theory to describe the Moon's orbit around the Earth in light of the gravitational forces being exerted by the Moon, Earth and the sun. (eurekalert.org)
  • Four hundred years ago, he realized that if Copernicus was right -- that the Earth orbits the Sun -- they could show it by observing the "parallactic motion" of the nearest stars. (sciencedaily.com)
  • But it uses its engines to give it enough momentum to miss earth and so fall constantly in an orbit. (khanacademy.org)
  • In this five minute clip we start in orbit around the Earth and spot the ISS nearby, we fly closer and enter through the cupola, fly through the ISS and exit through a window to marvel att the entire ISS structure. (lu.se)
  • However, Albert Einstein's general theory of relativity, which accounts for gravity as due to curvature of spacetime, with orbits following geodesics, provides a more accurate calculation and understanding of the exact mechanics of orbital motion. (wikipedia.org)
  • In relativity theory, orbits follow geodesic trajectories which are usually approximated very well by the Newtonian predictions (except where there are very strong gravity fields and very high speeds) but the differences are measurable. (wikipedia.org)
  • Orbits are possible due to the force of gravity - the same force that holds us to the surface of the planet. (space.com)
  • In 2013, physicists Milovan Šuvakov and Veljko Dmitrašinović at the Institute of Physics in Belgrade reported: "We present the results of a numerical search for periodic orbits of three equal masses moving in a plane under the influence of Newtonian gravity, with zero angular momentum. (eurekalert.org)
  • Cassini-Huygens is set to slip between two of Saturn's rings and then thrust into the planet's field of gravity in a maneuver called the Saturn Orbit Insertion (SOI). (technewsworld.com)
  • Second, he found that the orbital speed of each planet is not constant, as had previously been thought, but rather that the speed depends on the planet's distance from the Sun. Third, Kepler found a universal relationship between the orbital properties of all the planets orbiting the Sun. For the planets, the cubes of their distances from the Sun are proportional to the squares of their orbital periods. (wikipedia.org)
  • Yet now, two researchers at Shanghai Jiao Tong University, in the eastern Chinese coastal city of Shanghai, report that at least 7 of these newly discovered families of orbits are unstable. (eurekalert.org)
  • Newly discovered Alcor B orbits its larger sibling and was caught in the act with an innovative technique called "common parallactic motion" by members of Project 1640, an international collaborative team that includes astrophysicists at the American Museum of Natural History, the University of Cambridge's Institute of Astronomy, the California Institute of Technology, and NASA's Jet Propulsion Laboratory. (sciencedaily.com)
  • Alcor and its newly found, smaller companion Alcor B are both about 80 light-years away and orbit each other every 90 years or more. (sciencedaily.com)
  • Newton showed that, for a pair of bodies, the orbits' sizes are in inverse proportion to their masses, and that those bodies orbit their common center of mass. (wikipedia.org)
  • The major nerves and vessels to the orbit and globe enter through 3 openings. (medscape.com)
  • Foust, who said the engine burn is critical for Cassini to enter orbit and avoid flying right past Saturn, reported that indications suggest the engine is working fine. (technewsworld.com)
  • If Cassini-Huygens can successfully shoot itself into Saturn's orbit as planned, the craft will sail approximately 12,427 miles above the clouds of Saturn, 10 times closer than previous flybys and closer than any craft ever. (technewsworld.com)
  • This image of the right orbit shows superficial landmarks, optic canal, and superior and inferior orbital fissures. (medscape.com)
  • The optic canal is at the apex of the orbit and lies within the sphenoid bone. (medscape.com)
  • This image of the right orbit shows the 7 bones that contribute to its structure. (medscape.com)
  • The greater wing of the sphenoid, the maxilla, and the palatine bones of the orbit form the boundaries of the inferior orbital fissure. (medscape.com)
  • In the case of a circular orbit, these two component motions are orthogonal (90 degrees apart, or at right angles). (stardate.org)
  • Lines dropped through a central anterior-to-posterior axis of each orbit bisect at a 45° angle. (medscape.com)
  • However, this does not mean that a rocket needs to expend less energy in order to put a satellite into a higher orbit. (space.com)
  • The hunt is on in the satellite tracking community, as the U.S. Air Force's super-secret X-37B space plane rocketed into orbit today atop an Atlas V rocket out of Cape Canaveral. (universetoday.com)
  • The Long March 4C rocket lifted off from the Jiuquan Satellite Launch Center in the Gobi Desert of northwest China, placing Yaogan-34 into a 680-mile-high (1,100 km) orbit. (livescience.com)
  • Advances in Newtonian mechanics were then used to explore variations from the simple assumptions behind Kepler orbits, such as the perturbations due to other bodies, or the impact of spheroidal rather than spherical bodies. (wikipedia.org)
  • Einstein would say that an orbit is actually a geodisc in space - time, formed by the interaction between space and the mass of the two bodies. (stardate.org)
  • Where one body is much more massive than the other (as is the case of an artificial satellite orbiting a planet), it is a convenient approximation to take the center of mass as coinciding with the center of the more massive body. (wikipedia.org)
  • An orbit is actually composed of two motions: one directly toward the other body (planet or star. (stardate.org)
  • [1] Around this time, while rooming with a friend who was trying to start a recording studio, Orbit found his musical calling. (wikipedia.org)
  • In a new study published in the Beijing-based journal SCIENCE CHINA - Physics, Mechanics & Astronomy , Li Xiaoming and Liao Shijun state: "It is found that seven among these fifteen orbits greatly depart from the periodic ones within a long enough interval of time, and are thus most possibly unstable at least. (eurekalert.org)
  • In the new study, Li and Liao used the CNS with the high-enough Taylor series method to stringently check the 13 new families of periodic orbits discovered by Milovan Šuvakov and Veljko Dmitrašinović, but found that seven of these families greatly depart from periodic orbits across a long interval of time, and are thus most possibly unstable. (eurekalert.org)
  • A topological method is used to classify periodic three-body orbits into families, which fall into four classes, with all three previously known families belonging to one class," the two physicists added. (eurekalert.org)
  • In general, orbits described by the three-body problem are non-periodic, i.e. chaotic, and are rather sensitive to initial conditions. (eurekalert.org)
  • In the first week of August the Chinese Space Plane completed its second successful launch and is still in orbit. (strategypage.com)
  • During its first flight, the Chinese UOV was spotted by an American space surveillance system releasing a smaller object into orbit. (strategypage.com)
  • We used a brand new technique for determining that an object orbits a nearby star, a technique that's a nice nod to Galileo," says Ben R. Oppenheimer, Curator and Professor in the Department of Astrophysics at the Museum. (sciencedaily.com)
  • Such manoeuvres are periodically necessary because the station's orbit degrades over time. (newscientist.com)
  • When working with Beck , the two of them wrote a song for Pink, " Feel Good Time ," which Orbit then produced for the soundtrack for the 2003 film Charlie's Angels: Full Throttle . (wikipedia.org)
  • Therefore, it is rather difficult to gain reliable convergent numerical simulations of chaotic orbits of three-body systems across a long interval of time. (eurekalert.org)
  • On May 17 2020, one of the American X-37Bs was launched into orbit, the sixth time this has been done. (strategypage.com)
  • The X-37B has been doing this for over a decade now, going into orbit for the first time in April 2010, and remaining up there for over seven months. (strategypage.com)
  • Gaia, our colleagues here at Lund Observatory have simulated the time dependent positions of the Globular Clusters as they orbit around our galaxy. (lu.se)
  • Due to this, it is also difficult to find periodic orbits of three-body systems by means of numerical methods. (eurekalert.org)
  • A computed tomography (CT) scan of the orbit is an imaging method. (medlineplus.gov)
  • The latest X-37B in orbit was reported to be carrying more items to put into orbit than any previous X-37B. (strategypage.com)
  • The basis for the modern understanding of orbits was first formulated by Johannes Kepler whose results are summarised in his three laws of planetary motion. (wikipedia.org)
  • A cubesat placed in the proper orbit could intercept and destroy or disable a much larger satellite. (strategypage.com)
  • Google glass Orbit (gaming) for players to connect with their console, receive notifications, messages or other is easy! (coroflot.com)
  • Then on 4 May, the Progress ship docked to the station fired its engines for 6.5 minutes to boost the station's orbit by 2.7 kilometres. (newscientist.com)