• Petrous portion (From Latin petrous 'rocky') may refer to: Petrous portion of the temporal bone Petrous portion of the internal carotid artery This article includes a list of related items that share the same name (or similar names). (wikipedia.org)
  • The petrous apex lies at the anterior superior portion of the temporal bone. (medscape.com)
  • An axial CT scan of the temporal bone shows an air-fluid level within the right petrous apex and fluid within the middle ear space and mastoid. (medscape.com)
  • The petrous portion of the temporal bone houses the organs for hearing, equilibrium and motion detection. (cdc.gov)
  • The labyrinth lies within the petrous portion of the temporal bone adjacent to the mastoid cavity and connects with the middle ear at the oval and round windows. (medscape.com)
  • Portion of the temporal bone (which supports the temple ) that contain sections of the organs that facilitate hearing. (aans.org)
  • In the temporal bone, the scaly portion represents the largest bone section. (amplifon.com)
  • The tympanic part of the temporal bone, which has a horseshoe shape, is located under the scaly portion and higher than the styloid process. (amplifon.com)
  • Mastoid, on the other hand, is the bony portion of the temporal bone behind the ear, which houses a number of important muscles, including the sternocleidomastoid muscle. (amplifon.com)
  • The styloid process is the bony protrusion that arises from the lower portion of the temporal bone. (amplifon.com)
  • The petrous apex is a pyramid shaped portion of the temporal bone located 3-4 centimeters deep to the ear. (neurotucson.com)
  • The diagnosis of petrous apex mucocele is made after thorough microscope examination of the ears, comprehensive hearing tests and imaging studies, including CT of the temporal bones and MRI scans with internal auditory canal protocols. (neurotucson.com)
  • The middle ear is a chamber located within the petrous portion of the temporal bone. (anatomysystem.com)
  • The ganglion lies in the middle cranial fossa near the apex of the petrous portion of the temporal bone. (bookdome.com)
  • It lies within the petrous portion of the temporal bone and consists of bags and ducts of the membranous labyrinth. (bvsalud.org)
  • This dark shadow is continuous, posteriorly, with that which is caused by the dense petrous portion of the temporal bone. (co.ma)
  • Temporal bone fractures have been classified by orientation with respect to the long axis of the petrous portion of the temporal bone. (msdmanuals.com)
  • The nerve may be involved intracranially, along its course through the petrous portion of the temporal bone, or along its extracranial course. (edu.au)
  • The mastoid portion of the temporal bone contains the hollow mastoid process. (pdfslide.us)
  • The tympanic portion of temporal bone contains the external acoustic meatus and the styloid process. (pdfslide.us)
  • The inner ear is located within the petrous portion of the temporal bone and is composed of a membranous labyrinth surrounded by an osseous labyrinth. (basicmedicalkey.com)
  • It is situated within the dural cleft on the cerebral surface of the petrous portion of the temporal bone and gives off the ophthalmic, maxillary, and part of the mandibular nerves. (lookformedical.com)
  • Uncal herneation causes a third nerve palsy by streching the oculomotor nerve over the petroclinoid ligament , a delicate band of dura stretching between the clinoid process and petrous portion of the temporal bone (purists may remark that it is an extention of the tentorium cerebelli). (derangedphysiology.com)
  • It is formed by the posterior third of the superior surface of the body of the sphenoid (SPHENOID BONE), by the occipital, the petrous, and mastoid portions of the TEMPORAL BONE, and the posterior inferior angle of the PARIETAL BONE. (centralx.com)
  • A neoplastic soft tissue with expansile osseous destruction of underlying right petrous apex, well demarcated, lobulated with moderate enhancement on post contrast T1, no cystic component. (neuroradiologycases.com)
  • Neoplastic and inflammatory lesions are the most common pathologic processes in the petrous apex. (medscape.com)
  • The presenting symptoms of petrous apex lesions can be specific, readily directing attention to the apex, or these symptoms can be vague and nonspecific, not clearly calling attention to the skull base. (medscape.com)
  • Imaging studies are the primary method used to diagnose petrous apex lesions. (medscape.com)
  • With the exception of petrous apicitis and skull base osteomyelitis, all lesions of the petrous apex are best treated surgically. (medscape.com)
  • Petrous apex lesions were primarily diagnosed as complications of chronic otitis media. (medscape.com)
  • A , Noncontrast axial CT scan shows subcutaneous mass ( arrow ) and local skull defect on the upper portion of the petrous bone. (ajnr.org)
  • The petrous part is located between the sphenoid bone and occipital bone, and it functions to protect the structures of the middle and inner ear. (amplifon.com)
  • The petrous portion of the third piece of the Ambien Cr Order Online sphenoid, the integument. (homedecorbuzz.com)
  • Inferiorly the sinus area is bounded and to some extent overlapped and obliterated by the dense shadow which corresponds from latero-medially to the tuberculum articulare and the horizontal portion of the great wing of the sphenoid, that is to say, to the floor of the middle fossa of the base of the skull. (co.ma)
  • Anteriorly is the shadow of the posterior ethmoidal cells (blurred by that produced by the vertical portion of the great wing of the sphenoid), while posteriorly it is limited by the shadow produced by that portion of the body of the sphenoid which lies inferior to the dorsum sellæ. (co.ma)
  • The choroid is located in the posterior portion. (medcell.org)
  • It is a large bone formed by the fusion of parts: the squamous (the flattened anterior-superior part), the tympanic (the curved anterior-inferior part), the mastoid (the irregular posterior portion), and the petrous (the part at the base of the skull). (ucdenver.edu)
  • The cerebellopontine angle (CPA) is formed by the petrosal cerebellar surface, middle cerebellar peduncle, lateral pons, petrosal surface of the petrous bone, and clival portion of the occipital bone. (duke.edu)
  • Perpendicular plate: forms upper portion of bony nasal septum 3. (slideshare.net)
  • Lower portion of bony nasal septum 2. (slideshare.net)
  • The sphenoidal sinuses constitute the surgeon's guide to the hypophysis To reach them he traverses the upper portions of both nasal cavities, removing. (co.ma)
  • The single frontal bone forms the anterior roof and anterior floor of the cranium, the forehead, a portion of the nasal cavity roof, and the superior arch of the orbits. (pdfslide.us)
  • The tympanic portion consists of the anterior, posterior, and inferior parts of the external auditory canal and the posterior part of the glenoid fossa. (amplifon.com)
  • The cornea is located in the anterior portion of this layer. (medcell.org)
  • The ciliary body is located in the anterior portion of the uveal layer, right behind the limbus. (medcell.org)
  • from before backwards, the upper portion of the septum nasi, the superior and middle conchæ, and the anterior and posterior ethmoidal cells. (co.ma)
  • The hypophysis is then exposed by breaking down the anterior portion of the floor of the sella turcica, which forms a bullous-like projection into the superior and posterior part of the sinuses. (co.ma)
  • end portion of a long bone _____ helps reduce friction at joints _____ site of blood cell formation _____ two membranous sites of osteoprogenitor cells _____ scientific term for bone shaft _____ contains yellow marrow in adult bones _____ growth plate remnant _____ composed of adipose tissue and is important in energy storage a. (solutionessays.com)
  • The parietal bone or os parietale is a paired, flat cranial bone that covers the mid portion of the skull. (flyinggiraffeteas.com)
  • Combined, the petrous and mastoid portions make up the petromastoid portion. (amplifon.com)
  • [ 1 ] MRI more accurately evaluates en plaque and posterior fossa meningiomas, which may be missed on CT scanning. (medscape.com)
  • Located near the opening at the base of the skull through which the lower portion of the brainstem passes. (aans.org)
  • Structures within the middle ear amplify sound waves and transmit them to an appropriate portion of the internal ear. (anatomysystem.com)
  • The calvaria, the upper dome-like portion of the skull, consists of portions of the frontal, parietal, and occipital bones. (pdfslide.us)
  • A small autonomic ganglion lying on the outside of the optic nerve in the rear portion of the orbit. (unboundmedicine.com)
  • It means that the tested optic nerve is damaged in the pre-chiasmal portion. (derangedphysiology.com)
  • Descending branches, the petrous portion of the back part of the posterior mapnlar 1^ inches. (nighthawkinteractive.com)
  • The foregoing pages back obtrusive portions of the inflammation, at the surgeon is complicated ovariotomy. (norfolkseniorcenter.org)
  • Right side ICA petrous portion completely encased by the mass but show normal T2 flow voids. (neuroradiologycases.com)
  • Petrous portion (From Latin petrous 'rocky') may refer to: Petrous portion of the temporal bone Petrous portion of the internal carotid artery This article includes a list of related items that share the same name (or similar names). (wikipedia.org)
  • The petrous apex lies at the anterior superior portion of the temporal bone. (medscape.com)
  • An axial CT scan of the temporal bone shows an air-fluid level within the right petrous apex and fluid within the middle ear space and mastoid. (medscape.com)
  • Petrositis most often refers to infection of the petrous portion of the temporal bone, the bone in the skull that surrounds the ear. (medlineplus.gov)
  • The petrous portion of the temporal bone houses the organs for hearing, equilibrium and motion detection. (cdc.gov)
  • Mastoiditis is the inflammation of a portion of the temporal bone referred to as the mastoid air cells. (nih.gov)
  • The middle ear cavity is continuous with the lining of the mastoid air cells, which are a portion of the temporal bone. (nih.gov)
  • The labyrinth lies within the petrous portion of the temporal bone adjacent to the mastoid cavity and connects with the middle ear at the oval and round windows. (medscape.com)
  • A case of paralysis of the facial nerve following external injury to the petrous portion of the temporal bone. (nih.gov)
  • is larger than the superior and is situated in a depression in the lower border of the petrous portion of the temporal bone. (bartleby.com)
  • Portion of the temporal bone (which supports the temple ) that contain sections of the organs that facilitate hearing. (aans.org)
  • The inner ear is embedded in the petrous portion of the temporal bone, that forms part of the floor of the cranial cavity. (digitalhistology.org)
  • The petrous portion of the temporal bone houses the inner ear and forms a portion of the floor of the cranial cavity. (digitalhistology.org)
  • Temporal bone fractures have been classified by orientation with respect to the long axis of the petrous portion of the temporal bone. (msdmanuals.com)
  • Found near our ears, this pyramid-shaped portion of the temporal bone is nicknamed the petrous bone. (nih.gov)
  • Entering the internal acoustic meatus in the petrous portion of the temporal bone. (stemcellmia.com)
  • The inner ear, located in the petrous portion of the temporal bone, houses receptors that monitor changes in sound, gravity and movement. (digitalhistology.org)
  • The inner ear is housed in the petrous portion of the temporal bone. (digitalhistology.org)
  • It lies within the petrous portion of the temporal bone and consists of bags and ducts of the membranous labyrinth. (bvsalud.org)
  • This dark shadow is continuous, posteriorly, with that which is caused by the dense petrous portion of the temporal bone. (co.ma)
  • The nerve may be involved intracranially, along its course through the petrous portion of the temporal bone, or along its extracranial course. (nih.gov)
  • It is situated within the dural cleft on the cerebral surface of the petrous portion of the temporal bone and gives off the ophthalmic, maxillary, and part of the mandibular nerves. (bvsalud.org)
  • The internal acoustic canal (IAC), is a bony canal within the petrous portion of the temporal bone that transmits the VII and VIII cranial nerves and labyrinth vessels. (ijmhr.org)
  • Summer will also be sending a portion of the Lowbury Man's temporal bone (the part of the skull near the ear) to Germany for aDNA analysis. (reading.ac.uk)
  • The temporal bone has been selected for sampling as the bone that forms the petrous portion of the temporal is extremely dense and is more likely to retain traces of DNA than other, less dense bones. (reading.ac.uk)
  • The petrous part of the temporal bone (or more simply petrous temporal bone, PTB ) forms the part of skull base between the sphenoid and occipital bones . (pacs.de)
  • The lateral margin of the posterior border of greater wing articulates with the anterior border of petrous temporal bone . (radiopaedia.org)
  • The posterior most part of the greater wing projects as a triangular process, sitting within the angle of the junction between the squamous and petrous portions of the temporal bone . (radiopaedia.org)
  • A narrow fissure between the undersurface of the greater wing of the sphenoid and the petrous portion of the temporal bone. (med-word.com)
  • 4. Analysis of the petrous portion of the internal carotid artery: landmarks for an endoscopic endonasal approach. (nih.gov)
  • Guidant Corporation, Inc., Santa Clara, CA), which was positioned in the distal cervical segment of the left internal carotid artery, just proximal to its petrous portion. (ajnr.org)
  • MR angiography of the brain (MRA): virgate imaging petrous segment and the proximal portion of the left internal carotid artery and occlusion of the distal vessel. (biomedcentral.com)
  • a squamous portion and a petrous portion. (nih.gov)
  • This portion gives rise to the caroticotympanic artery, supplying the tympanic cavity, and the pterygoid or vidian branch passing through the pterygoid canal. (medscape.com)
  • The tympanic portion lines the external auditory meatus and the petrous portion is an interior structure and is not visible from a lateral view. (nurseday.org)
  • bone, of pyramidal form, is fused to the medial aspect of the tympanic and squamosal portions, extending behind them, however, to form the well-marked and prominent mastoid process, which lies posterior to the external acoustic meatus. (co.ma)
  • The proximal portion of the facial canal is termed the horizontal part . (cloudfront.net)
  • The proximal portion does not open well. (neuroangio.org)
  • Inferiorly the sinus area is bounded and to some extent overlapped and obliterated by the dense shadow which corresponds from latero-medially to the tuberculum articulare and the horizontal portion of the great wing of the sphenoid, that is to say, to the floor of the middle fossa of the base of the skull. (co.ma)
  • Fused medially with the petrous part, its lower edge, sharp and well defined medially, splits to enclose the root of the projecting styloid process, and is hence called the vagina processus styloidei (sheath of the styloid process). (co.ma)
  • It is very small, and is usually regarded as a detached portion of the petrous ganglion. (bartleby.com)
  • The branches to the vagus are two filaments which arise from the petrous ganglion, one passing to the auricular branch, and the other to the jugular ganglion, of the vagus. (bartleby.com)
  • The petrous ganglion is connected by a filament with the superior cervical ganglion of the sympathetic. (bartleby.com)
  • It arises from the trunk of the glossopharyngeal below the petrous ganglion, and joins the facial just after the exit of that nerve from the stylomastoid foramen. (bartleby.com)
  • A small autonomic ganglion lying on the outside of the optic nerve in the rear portion of the orbit. (unboundmedicine.com)
  • On occasion, the persistent stapedial branch of the petrous segment traverses a bony canal and continues as the middle meningeal artery. (medscape.com)
  • The sphenoidal sinuses constitute the surgeon's guide to the hypophysis To reach them he traverses the upper portions of both nasal cavities, removing. (co.ma)
  • 10. Visualization of Dark Side of Skull Base with Surgical Navigation and Endoscopic Assistance: Extended Petrous Rhomboid and Rhomboid with Maxillary Nerve-Mandibular Nerve Vidian Corridor. (nih.gov)
  • Located near the opening at the base of the skull through which the lower portion of the brainstem passes. (aans.org)
  • 3. Lateral semicircular canal: projects horizontally and laterally with respect to the petrous bone. (drtbalu.co)
  • Improvements in antibiotic therapy, surgery for chronic otitis media, and the development of tympanostomy tubes have decreased incidence of suppurative petrous apicitis . (medscape.com)
  • Portions of the cochlear duct can be dissected free from the otic capsule, placed flat on microscope slides in a liquid medium and cover-slipped (e.g. (cdc.gov)
  • The portion of the membranous labyrinth housed within the cochlea is the cochlear duct, containing the receptor for sound, the organ of Corti. (digitalhistology.org)
  • The membranous portion of the cochlea (cochlear duct) follows the spirals of the bony cochlea and terminates deep to the cochlear cupula. (drtbalu.co)
  • In passing through the jugular foramen, the nerve presents two ganglia, the superior and the petrous (Fig. 791 ). (bartleby.com)
  • The membranous portion i.e semicircular ducts occupy the semicircular canals are smaller than the bony canals. (drtbalu.co)
  • But, at the ampulla the membranous portion enlarges to occupy the entire space of the bony ampullae. (drtbalu.co)
  • Though it is one of the hardest, densest bones in the body, some portions (such as the area in orange, protecting the cochlea) are denser than others. (nih.gov)
  • Possibly because the petrous bone is so dense, DNA within the petrous bone is better preserved than in other bones. (nih.gov)
  • In some cases, scientists have extracted more than 100 times more DNA from the petrous bone than other bones, including teeth. (nih.gov)
  • Perhaps because the petrous bone is so dense, it also is the bone in the body that best preserves DNA after a person dies. (nih.gov)
  • Anteriorly is the shadow of the posterior ethmoidal cells (blurred by that produced by the vertical portion of the great wing of the sphenoid), while posteriorly it is limited by the shadow produced by that portion of the body of the sphenoid which lies inferior to the dorsum sellæ. (co.ma)
  • But the neck increases inner portion of tlie Best Tramadol Online inferior maxillary, half in the preceding. (cabelecelectronica.com)
  • The portion of the membranous labyrinth housed within each semicircular canal is the semicircular duct, containing a crista ampullaris, the receptor for angular acceleration. (digitalhistology.org)
  • [ citation needed ] here, the prominence of the facial canal (or prominence of the aqueduct of Fallopius ) upon the medial wall indicates the position of the superior portion of the facial canal. (cloudfront.net)
  • The intracranial segment of the ICA is divided into petrous, cavernous, supraclinoid portions. (medscape.com)
  • The cochlea is the portion of the osseous labyrinth that is coiled into a spiral of 2.5 turns, resembling a snail shell. (digitalhistology.org)
  • 791- Plan of upper portions of glossopharyngeal, vagus, and accessory nerves. (bartleby.com)
  • The semicircular canals are three tunnels that form the posterolateral portion of the osseous labyrinth. (digitalhistology.org)
  • The sensory fibers arise from the cells of the superior and petrous ganglia, which are situated on the trunk of the nerve, and will be presently described. (bartleby.com)
  • NVSC mostly originates in the transition zone or root entrance zone (REZ), which is used to define the portion of the nerve that includes the central and peripheral myelin. (clinmedjournals.org)
  • portion of the transverse venous sinus. (co.ma)
  • Its lower three-fourths of the licvator ani into three inches in to the external Can I Buy Ambien In Canada iliac portion of the lachrymal. (homedecorbuzz.com)
  • It is fonubd byastrong aponen- lotic bridle of the vessel en the lower end of 1. (homedecorbuzz.com)
  • This is significant because in-growth of this outer epithelial portion through the perforation can result in an epithelial cyst called an acquired cholesteatoma. (healthjade.net)
  • The portions of the membranous labyrinth housed within the vestibule are the utricle and saccule, each containing a macula, the receptor for linear acceleration and gravity. (digitalhistology.org)
  • SciMed, Inc., Boston, MA) was introduced through the microcatheter, and its tip was positioned in the insular portion of the middle cerebral artery to ensure maximal support, allowing tracking of the balloon and stent. (ajnr.org)
  • The mean height and width of right and left side of IAM at porous end, middle portion and fundus end was 3.56 & 3.86mm & 3.48 & 4.13 mm, 3.52 & 3.37mm & 3.44 & 3.47mm, 3.26mm & 3.08mm, 3.36 & 3.19mm respectively. (ijmhr.org)
  • Also, it's worth it to check with your dental insurance - a portion of your treatment may be covered by your dental health plan. (petrousortho.com)