Processes and properties of the EYE as a whole or of any of its parts.
Physiological processes and properties of the DENTITION.
Properties and processes of the DIGESTIVE SYSTEM and DENTITION as a whole or of any of its parts.
Physiology of the human and animal body, male or female, in the processes and characteristics of REPRODUCTION and the URINARY TRACT.
Properties, and processes of the MUSCULOSKELETAL SYSTEM and the NERVOUS SYSTEM or their parts.
Functional processes and properties characteristic of the BLOOD; CARDIOVASCULAR SYSTEM; and RESPIRATORY SYSTEM.
The properties and relationships and biological processes that characterize the nature and function of the SKIN and its appendages.
Nutritional physiology related to EXERCISE or ATHLETIC PERFORMANCE.
Physiological processes, factors, properties and characteristics pertaining to REPRODUCTION.
The functions and properties of living organisms, including both the physical and chemical factors and processes, supporting life in single- or multi-cell organisms from their origin through the progression of life.
Nutritional physiology of adults aged 65 years of age and older.
Properties, functions, and processes of the URINARY TRACT as a whole or of any of its parts.
Processes and properties of the MUSCULOSKELETAL SYSTEM.
Biological properties, processes, and activities of VIRUSES.
Properties and processes of the DIGESTIVE SYSTEM as a whole or of any of its parts.
Physiological processes and properties of the BLOOD.
A condition in which the intraocular pressure is elevated above normal and which may lead to glaucoma.
Nutritional physiology of children aged 13-18 years.
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.
Characteristic properties and processes of the NERVOUS SYSTEM as a whole or with reference to the peripheral or the CENTRAL NERVOUS SYSTEM.
Infection caused by the protozoan parasite TOXOPLASMA in which there is extensive connective tissue proliferation, the retina surrounding the lesions remains normal, and the ocular media remain clear. Chorioretinitis may be associated with all forms of toxoplasmosis, but is usually a late sequel of congenital toxoplasmosis. The severe ocular lesions in infants may lead to blindness.
Cellular processes, properties, and characteristics.
Physiological processes and properties of the RESPIRATORY SYSTEM as a whole or of any of its parts.
The functions of the skin in the human and animal body. It includes the pigmentation of the skin.
Nutrition of FEMALE during PREGNANCY.
The physiological processes, properties, and states characteristic of plants.
Physiological processes and properties of BACTERIA.
Processes and properties of the CARDIOVASCULAR SYSTEM as a whole or of any of its parts.
The functional superiority and preferential use of one eye over the other. The term is usually applied to superiority in sighting (VISUAL PERCEPTION) or motor task but not difference in VISUAL ACUITY or dysfunction of one of the eyes. Ocular dominance can be modified by visual input and NEUROTROPHIC FACTORS.
Albinism affecting the eye in which pigment of the hair and skin is normal or only slightly diluted. The classic type is X-linked (Nettleship-Falls), but an autosomal recessive form also exists. Ocular abnormalities may include reduced pigmentation of the iris, nystagmus, photophobia, strabismus, and decreased visual acuity.
Nutrition of a mother which affects the health of the FETUS and INFANT as well as herself.
Measurement of ocular tension (INTRAOCULAR PRESSURE) with a tonometer. (Cline, et al., Dictionary of Visual Science, 4th ed)
Refraction of LIGHT effected by the media of the EYE.
Tumors or cancer of the EYE.
Nutritional physiology of children aged 2-12 years.
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)
The processes and properties of living organisms by which they take in and balance the use of nutritive materials for energy, heat production, or building material for the growth, maintenance, or repair of tissues and the nutritive properties of FOOD.
The transparent anterior portion of the fibrous coat of the eye consisting of five layers: stratified squamous CORNEAL EPITHELIUM; BOWMAN MEMBRANE; CORNEAL STROMA; DESCEMET MEMBRANE; and mesenchymal CORNEAL ENDOTHELIUM. It serves as the first refracting medium of the eye. It is structurally continuous with the SCLERA, avascular, receiving its nourishment by permeation through spaces between the lamellae, and is innervated by the ophthalmic division of the TRIGEMINAL NERVE via the ciliary nerves and those of the surrounding conjunctiva which together form plexuses. (Cline et al., Dictionary of Visual Science, 4th ed)
Nutritional physiology of children from birth to 2 years of age.
Damage or trauma inflicted to the eye by external means. The concept includes both surface injuries and intraocular injuries.
The pressure of the fluids in the eye.
Tuberculous infection of the eye, primarily the iris, ciliary body, and choroid.
The fluid secreted by the lacrimal glands. This fluid moistens the CONJUNCTIVA and CORNEA.
Sterile solutions that are intended for instillation into the eye. It does not include solutions for cleaning eyeglasses or CONTACT LENS SOLUTIONS.
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.
Voluntary or reflex-controlled movements of the eye.
Three long canals (anterior, posterior, and lateral) of the bony labyrinth. They are set at right angles to each other and are situated posterosuperior to the vestibule of the bony labyrinth (VESTIBULAR LABYRINTH). The semicircular canals have five openings into the vestibule with one shared by the anterior and the posterior canals. Within the canals are the SEMICIRCULAR DUCTS.
The four cellular masses in the floor of the fourth ventricle giving rise to a widely dispersed special sensory system. Included is the superior, medial, inferior, and LATERAL VESTIBULAR NUCLEUS. (From Dorland, 27th ed)
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)
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.
A gelatinous membrane overlying the acoustic maculae of SACCULE AND UTRICLE. It contains minute crystalline particles (otoliths) of CALCIUM CARBONATE and protein on its outer surface. In response to head movement, the otoliths shift causing distortion of the vestibular hair cells which transduce nerve signals to the BRAIN for interpretation of equilibrium.

Evidence for an eye-centered spherical representation of the visuomotor map. (1/604)

During visually guided movement, visual coordinates of target location must be transformed into coordinates appropriate for movement. To investigate the representation of this visuomotor coordinate transformation, we examined changes in pointing behavior induced by a local visuomotor remapping. The visual feedback of finger position was limited to one location within the workspace, at which a discrepancy was introduced between the actual and visually perceived finger position. This remapping induced a change in pointing that extended over the entire workspace and was best captured by a spherical coordinate system centered near the eyes.  (+info)

Hypersensitivity in the anterior median eye of a jumping spider. (2/604)

Changes in sensitivity of the photoreceptor cells of the anterior median eye of the jumping spider Menemerus confusus Boes. et Str. have been studied by recording electroretinograms (ERGs) and receptor potentials. The amplitudes of the responses (ERGs and receptor potentials) increase during repetitive stimulation, with a maximum increase at 3-5 s intervals. The sensitivity of the photoreceptor cell is greater for about 60 s following illumination (maximum magnitude at 3-5 s) than it is during complete dark adaptation. This phenomenon, which we call 'hypersensitivity', is lost within one day following surgery in physiological saline. Upon loss of hypersensitivity, the sensitivity decrease during light adaptation is greater than for the normal eye and the small increase of sensitivity following the onset of illumination observed for the normal eye is lost.  (+info)

Regulation of mammalian circadian behavior by non-rod, non-cone, ocular photoreceptors. (3/604)

Circadian rhythms of mammals are entrained by light to follow the daily solar cycle (photoentrainment). To determine whether retinal rods and cones are required for this response, the effects of light on the regulation of circadian wheel-running behavior were examined in mice lacking these photoreceptors. Mice without cones (cl) or without both rods and cones (rdta/cl) showed unattenuated phase-shifting responses to light. Removal of the eyes abolishes this behavior. Thus, neither rods nor cones are required for photoentrainment, and the murine eye contains additional photoreceptors that regulate the circadian clock.  (+info)

Residual vision in the blind field of hemidecorticated humans predicted by a diffusion scatter model and selective spectral absorption of the human eye. (4/604)

The notion of blindsight was recently challenged by evidence that patients with occipital damage and contralateral field defects show residual islands of vision which may be associated with spared neural tissue. However, this possibility could not explain why patients who underwent the resection or disconnection of an entire cerebral hemisphere exhibit some forms of blindsight. We present here a model for the detection of intraocular scatter, which can account for human sensitivity values obtained in the blind field of hemidecorticated patients. The model demonstrates that, under controlled experimental conditions i.e. where the extraocular scatter is eliminated, Lambertian intraocular scatter alone can account for the visual sensitivities reported in these patients. The model also shows that it is possible to obtain a sensitivity in the blind field almost equivalent to that in the good field using the appropriate parameters. Finally, we show with in-vivo spectroreflectometry measurements made in the eyes of our hemidecorticated patients, that the relative drop in middle wavelength sensitivity generally obtained in the blind field of these patients can be explained by selective intraocular spectral absorption.  (+info)

The physiological effects of monocular deprivation and their reversal in the monkey's visual cortex. (5/604)

1. 1127 single units were recorded during oblique penetrations in area 17 of one normal, three monocularly deprived and four reverse sutured monkeys. 2. In all animals most cells outside layer IV c were orientation-selective, and preferred orientation usually shifted from cell to cell in a regular progressive sequence. 3. The presence in layer IV c of non-oriented, monocularly driven units, organized in alternating right-eye and left-eye 'stripes' (LeVay, Hubel & Wiesel, 1975) was confirmed. 4. Early monocular deprivation (2--5 1/2 weeks) caused a strong shift of ocular dominance towards the non-deprived eye. However, even outside layer IV c, neural background and some isolated cells could still be driven from the deprived eye in regularly spaced, narrow columnar regions. In layer IV c the non-deprived eye's stripes were almost three times wider, on average, than the deprived. 5. Later monocular deprivation (11--16 months) had no detectable influence on layer IV c but seemed to cause a small shift in ocular dominance outside IV c. Deprivation for 6 1/4 months in an adult had no such effect. 6. After early reverse suturing (at 5 1/2 weeks) the originally deprived eye gained dominance over cells outside layer IV c just as complete as that originally exercised by the eye that was first non-deprived. 7. The later reverse suturing was delayed, the less effective was recapture by the originally deprived eye. Reversal at 8 weeks led to roughly equal numbers of cells being dominated by each eye; fewer cells became dominated by the newly open eye after reverse suturing at 9 weeks and most of them were non-oriented; reversal at 38 1/2 weeks had no effect. 8. Binocular cells, though rare in reverse sutured animals, always had very similar preferred orientations in the two eyes. The columnar sequences of preferred orientation were not interrupted at the borders of ocular dominance columns. 9. Even within layer IV c there was evidence for re-expansion of physiologically determined ocular dominance stripes. After early reverse suture, stripes for the two eyes became roughly equal in width. Possible mechanisms for these changes are discussed.  (+info)

Enhanced NR2A subunit expression and decreased NMDA receptor decay time at the onset of ocular dominance plasticity in the ferret. (6/604)

Enhanced NR2A subunit expression and decreased NMDA receptor decay time at the onset of ocular dominance plasticity in the ferret. The NMDA subtype of glutamate receptor is known to exhibit marked changes in subunit composition and functional properties during neural development. The prevailing idea is that NMDA receptor-mediated synaptic responses decrease in duration after the peak of cortical plasticity in rodents. Accordingly, it is believed that shortening of the NMDA receptor-mediated current underlies the developmental reduction of ocular dominance plasticity. However, some previous evidence actually suggests that the duration of NMDA receptor currents decreases before the peak of plasticity. In the present study, we have examined the time course of NMDA receptor changes and how they correlate with the critical period of ocular dominance plasticity in the visual cortex of a highly binocular animal, the ferret. The expression of NMDA receptor subunits NR1, NR2A, and NR2B was examined in animals ranging in age from postnatal day 16 to adult using Western blotting. Functional properties of NMDA receptors in layer IV cortical neurons were studied using whole cell patch-clamp techniques in an in vitro slice preparation of ferret primary visual cortex. We observed a remarkable increase in NR1 and NR2A, but not NR2B, expression after eye opening. The NMDA receptor-mediated synaptic currents showed an abrupt decrease in decay time concurrent with the increase in NR2A subunit expression. Importantly, these changes occurred in parallel with increased ocular dominance plasticity reported in the ferret. In conclusion, molecular changes leading to decreased duration of the NMDA receptor excitatory postsynaptic current may be a requirement for the onset, rather than the end, of the critical period of ocular dominance plasticity.  (+info)

Visual perception: here's mud in your mind's eye. (7/604)

We appear to be unaware of large changes in our visual scene if our attention is temporarily diverted. This suggests that the rich, complete visual scene that we appear to have may be just an illusion.  (+info)

Heterothermal acclimation: an experimental paradigm for studying the control of thermal acclimation in crabs. (8/604)

A method for the study of the control of the attainment of thermal acclimation has been applied to the crabs, Cancer pagurus and Carcinus maenas. Crabs were heterothermally acclimated by using an anterior-posterior partition between two compartments, one at 8 degrees C and the other at 22 degrees C. One compartment held a three-quarter section of the crab including the central nervous system (CNS), eye stalks, and ipsilateral legs; the other held a quarter section including the contralateral legs. Criteria used to assess the acclimation responses were comparisons of muscle plasma membrane fatty acid composition and "fluidity." In both species, the major fatty acids of phosphatidylcholine were 16:0, 18:1, 20:5, and 22:6, whereas phosphatidylethanolamine contained significantly less 16:0 but more 18:0; these fatty acids comprised 80% of the total. Differences in fatty acid composition were demonstrated between fractions obtained from the ipsilateral and contralateral legs from the same heterothermally acclimated individual. In all acclimation states (except 22CNS, phosphatidylcholine fraction), membrane lipid saturation was significantly increased with acclimation at 22 degrees as compared with 8 degrees C. Membrane fluidity was determined by using 1,3-diphenyl-1,3,5 hexatriene (DPH) fluorescence polarization. In both species, membranes from legs held at 8 degrees were more fluid than from legs held at 22 degrees C irrespective of the acclimation temperature of the CNS. Heterothermal acclimation demonstrated that leg muscle membrane composition and fluidity respond primarily to local temperature and were not predominately under central direction. The responses between 8 degrees C- and 22 degrees C-acclimated legs were more pronounced when the CNS was cold-acclimated, so a central influence cannot be excluded.  (+info)

Definition of ocular physiological phenomena in the Definitions.net dictionary. Meaning of ocular physiological phenomena. What does ocular physiological phenomena mean? Information and translations of ocular physiological phenomena in the most comprehensive dictionary definitions resource on the web.
The intercellular relationships in the ommatidia of the lateral eye of Limulus have been investigated. The distal process of the eccentric cell gives origin to microvilli which interdigitate with the microvilli of the retinular cells. Therefore, both types of visual cells contribute to form the rhabdom and may have an analogous photoreceptor function. Quintuple-layered junctions are found within the rhabdom at the lines of demarcation between adjoining microvilli, whether the microvilli originate from a single retinular cell, from two adjacent retinular cells, or from a retinular cell and the eccentric cell. Furthermore, quintuple-layered junctions between the eccentric cell and the tips of the microvilli of the retinular cells occur at the boundary between the distal process and the rhabdom. These findings are interpreted to indicate that the rhabdom provides an extensive electrotonic junction relating retinular cells to one another and to the eccentric cell. Quintuple-layered junctions between ...
The Dashs sock-like bootie design, which keeps out debris, is combined with arch-lasted construction for a supportive fit. Lacing is asymmetrical with offset eyelets that help to reinforce the support.
A general theory previously proposed by the author which describes synaptic stabilization on the basis of three basic assumptions is employed for the understanding of ocular dominance column formation
Light-evoked intracellular voltage noise records have been obtained from Limulus eccentric cells, from threshold light intensity to an intensity .10(5) times threshold. These data are analyzed in terms of a simple adapting-bump noise model. It is shown how the model yields a data reduction procedure that slightly generalizes the familiar use of Campbells theorem for Poisson shot noise: the correlative effect of adaptation amends Campbells theorem by a single multiplicative factor, which may be estimated directly from the power spectrum of the noise data. The model also permits direct estimation of the bump shape from the power spectrum. The bump shape estimated from noise at dim light is in excellent agreement with the average shape of bumps observed directly in the dark. The data yield a bump rate that is linear with light up through about 50 times threshold intensity but that falls short of linearity by a factor of 35 at the brightest light. The bump height decreases as the -0.4 power of ...
The Central American hunting spider Cupiennius salei, like most other spiders, has eight eyes, one pair of principal eyes and three pairs of secondary eyes. The principal eyes and one pair of the secondary eyes have almost completely overlapping visual fields, and presumably differ in function. The retinae of the principal eyes can be moved independently by two pairs of eye muscles each, whereas t ...
These eyelets are made in a variety of sizes in either pink rose quartz or opalite. This design gives you that classic eyelet look.
Classic and feminine, white Eyelet Shorts have a comfortable elastic waist with a button closure, and handy pockets. Shorts are fully lined. Pair with our pr… Shop all Girls Apparel | HearthSong
This alb is made of 100% polyester for easy care and is accented with Swiss Schiffli Embroidery and Eyelet. This classy and refined alb is availabl
During development of the mammalian visual system, axon terminals of lateral geniculate nucleus (LGN) neurons, initially intermixed within layer 4 of the visual cortex, gradually segregate according to eye preference to form ocular dominance columns. In addition to LGN axons and layer 4 neurons, subplate neurons may also participate in interactions leading to column formation. Deletion of subplate neurons before the formation of ocular dominance columns prevents the segregation of LGN axons within layer 4. Thus, interactions between LGN axons and layer 4 neurons are not sufficient; subplate neurons are also required for formation of ocular dominance columns in the visual cortex. ...
Red latex rubber with two opposing lateral eyes. X-ray opaque. Improved over red vinyl tubes because it is bio-compatible and allows more patient comfort with less rigidity. Can be reused and reautoclaved. 40cm (16). 5/pk.
Medium profile contrasting eyelets sandwich baseball cap,min order 50pcs,sample 5days,bulk order 20days.Fast delivery with Door to door shipping service.
Buy Barrimore Elbow-Sleeve Eyelet Lace Top at YesStyle.com! Quality products at remarkable prices. FREE Worldwide Shipping available!
Up to 25 titles hang from adjustable floating rings that fit through the metal eyelets in the top corners of each chart. Just flip the charts up and over for convenient viewing. …
Provided is an RED eyelet performing non-contact identification function. The RFID eyelet includes an eyelet washer and eyelet base composed of nonconductive material, and an RED module is interposed between the eyelet washer and eyelet base. The RFID eyelet contains the RFID module in nonconductive material, thereby performing smooth electromagnetic wave communication without disturbance, and the eyelet base is simply coupled. with the eyelet washer by using a slanted projection formed in the eyelet base and a locker formed in the eyelet washer. Also, the RED module can be easily installed by using an internal flange or external flange formed in the inside of the eyelet base or eyelet washer, thereby having a merit of mass production.
A theory of movement perception has been proposed to explain the optomotor responses of the housefly (Musca domestica), and this has been tested by McCann & Maginitie (1965). The present study was made in order to ascertain if the anatomical and physiological properties of the compound eye are commensurate with those postulated by the model. The three properties studied were the inter-ommatidial angle, the receptive field of the retinula cells, and the relationship between light intensity and the magnitude of the generator potential. The angle between the axes of adjacent ommatidia was measured anatomically. This varies with the position in the eye but has a mean value of 3.9° in the horizontal plane and 2.4° in the vertical. During dark adaptation the secondary pigment cells contract by about 5 pm at either end, moving the pigment back away from the lenses and also exposing the focal region of the ommatidium. The receptive field of single retinula cells was measured electrophysiologically. ...
In NLP they use eye accessing cues. The idea is that when we access memory or construct an experience our eyes move in a certain way. The NLP claim is that by learning these eye accessing cues, you will get a clue to the way another person is thinking. E.g., looking down left indicates internal dialogue processing / tape loops - i.e. thinking about an unsolved problem. In an NLP session such points in a conversation will be marked as key moments indicating something which needs to be resolved later on. Looking up left is visual recall etc. http://www.smartdriving.co.uk/Misc_pages/Eye_accessing.htm My question is: What is the scientific basis for this, if any? Anyone with a good link? -Simon ...
Lund, R. D. and Mustari, M. J. (1977), Development of the geniculocortical pathway in rat. J. Comp. Neurol., 173: 289-305. doi: 10.1002/cne.901730206 ...
Compound eyes are types of eyes made up of many repeating units called ommatidia. These types of eyes are mainly present in insects, although some crustaceans, such as crayfish, also possess them. A...
Parcus Drill Tip Guide Pin With or Without Suture Eyelet Important Product Information Produktinformationsblatt Información Importante sobre el Producto Informations Importantes sur le Produit Directions
Shop from the world's largest selection and best deals for Next Polyester Eyelet Top Curtains & Pelmets. Shop with confidence on eBay!
TY - JOUR. T1 - Serotonin shifts the phase of the orcadian rhythm from the Aplysia eye. AU - Corrent, G.. AU - McAdoo, D. J.. AU - Eskin, A.. PY - 1978/12/1. Y1 - 1978/12/1. N2 - A putative neurotransmitter, serotonin, may be used to transmit temporal information in the eye of Aplysia, because it can shift the phase of the circadian rhythm of spontaneous optic nerve impulses from the eye and the eye contains a significant quantity of serotonin. Serotonin acts either directly on the cell, or cells, containing the circadian pacemaker or on cells electronically coupled to the pacemaker cells.. AB - A putative neurotransmitter, serotonin, may be used to transmit temporal information in the eye of Aplysia, because it can shift the phase of the circadian rhythm of spontaneous optic nerve impulses from the eye and the eye contains a significant quantity of serotonin. Serotonin acts either directly on the cell, or cells, containing the circadian pacemaker or on cells electronically coupled to the ...
Orientation and ocular dominance maps in the primary visual cortex of mammals are among the most thoroughly investigated of the patterns in the cerebral cortex. A considerable amount of work has been dedicated to unraveling both their detailed structure and the neural mechanisms that underlie their formation and development. Many schemes have been proposed, some of which are in competition. Some models focus on development of receptive fields while others focus on the structure of cortical maps, i.e., the arrangement of receptive field properties across the cortex. Each model used different means to determine its success at reproducing experimental map patterns, often relying principally on visual comparison. Experimental data are becoming available that allow a more careful evaluation of models. In this contribution more than 10 of the most prominent models of cortical map formation and structure are critically evaluated and compared with the most recent experimental findings from macaque ...
If you want to know how good the principal eyes spatial resolution is, the answer depends on where you are in the salticids principal-eye retina. The best spatial resolution (0.2 deg.) is in a central (`foveal) region in Layer 1. To put this into perspective, 0.2 deg. is the kind of resolution we might expect for a mammal or a bird eye but not for a small arthropod eye. Out of the details in this classic paper on the structure of the principal eyes retina, there emerges an unsettling suspicion that, with this unfamiliar design, the principal eye has an unusual, specialised role in vision. In the 1980s, this paper of Lands and the extraordinary spatial acuity of Layer 1 became the impetus for David Blests laboratory at the Australian National University making major advances in our understanding of how salticids see.. Besides the conventional approach of making measurements from sectioned material when calculating Layer 1s spatial acuity, Land designed and built an experimental ...
Optical imaging of primate visual cortex based on the intrinsic, activity-dependent signals. An overlaid image of the orientation columns (cortical regions that respond preferentially to visual stimuli containing borders of a particular angle, indicated by a particular color) and the ocular dominance columns (cortical regions prefering left eye stimulation coded by a darkening of color). See page 417. [Field of view: 6 millimeters by 3.5 millimeters. Imaged by Daniel Y. Tso, Ron D. Frostig, Edmund E. Lieke, and Amiram Grinvald, The Rockefeller University, and IBM Research Division] ...
Almost all animal eyes follow a few, relatively well-understood functional plans. Only rarely do researchers discover an eye that diverges fundamentally from known types. The principal eye E2 of sunburst diving beetle (Thermonectus marmoratus) larvae clearly falls into the rarer category. On the bas …
During my undergraduate degree at Dalhousie University I studied visual neuroscience. My honors project investigated the role of inhibitory interneurons in contrast adaptation. My passion for neuroscience started as a junior in high school when my grandmother had a stroke. I was driven to understand: What was the cause? Why did the symptoms manifest in such a way? My current project focuses on how natural compounds affect visual system development. I am very passionate about this project because of the clinical relevance and the potential to promote brain development through diet.. ...
Channel a bit of black magic with your look with these stunning black coat eyelets, which are set with an eye catching vitrail CZ gem!
We. Love. Eyelet. Especially on this sweet, school-ready dress with a contrasting striped skirt. Falls above knee. Cotton. Machine wash. Import. Select stores.
Vision problems can sometimes be momentary. Still, its important to know the signs that your eyes are bad so you can seek medical attention if needed.
During evolution, the eyes of vertebrates develop different adaptations in order to fit into the different habitats. In this chapter, 27 vertebrates, both rare and common, from different animal groups were selected to illustrate the histological differences in their retinae. For example, it is interesting to compare vertebrates between groups e.g. fish and amphibians. It is also interesting to compare vertebrates that are herbivores with those that are omnivores. In addition, comparing between species is also enlightening. A cat, which is an agile and fast moving animal, has a lot more types of visual cells than other slow moving species, while bottom living Chinese soft shelled turtles have visual cells that are rudimentary. In other cases, the Japanese eels, which inhabit both ocean and freshwater streams during their life-cycle, have retinae with highly packed and numerous visual cells while the goldfishes, which live in freshwater streams and ponds, have retinae with scattered visual cells. ...
Scorpions possess two types of visual organs, the median and lateral eyes. Both eyes consist of simple ocelli with biconvex lenses that differ in structure and function. There is little variation in the number of median ocelli across the order. Except for a few troglomorphic species in which the median ocelli are absent, all scorpions possess a single pair. In contrast, the number of pairs of lateral ocelli varies from zero to five across Scorpiones and may vary within species. No attempt has been made to homologize lateral ocelli across the order, and their utility in scorpion systematics has been questioned, due to the variation in number. A recent study examined the number of lateral ocelli among various Asian Buthidae C.L. Koch, 1837 and proposed a five-eye model for the family. This model has not been examined more broadly within Buthidae, however, nor compared with the patterns of variation observed among other scorpion families. An eyespot, referred to as an accessory lateral eye, ...
The subplate forms a transient circuit required for development of connections between the thalamus and the cerebral cortex. When subplate neurons are ablated, ocular dominance columns do not form in the visual cortex despite the robust presence of thalamic axons in layer 4. We show that subplate ab …
Previous investigators have reported greater shrinkage of ocular dominance columns ipsilateral to the sutured eye (Hubel et al., 1977; LeVay et al., 1980) or in peripheral cortex as opposed to opercular cortex (Swindale et al., 1981). We confirm these tendencies but attribute them to preexisting inequalities in column widths present in normal mosaics before the onset of visual deprivation. For example, the smallest columns are located in the peripheral cortex, serving the ipsilateral eye. After monocular deprivation, these columns become the most severely reduced in size. Visual deprivation seems to subtract the same amount of territory from all of the columns throughout any given mosaic, at least to a first approximation. This impression was supported by simulation of column shrinkage using the dilation filter available with the Mocha image analysis program. Stripping pixels evenly from one set of columns and adding them to the other set created a mosaic of artificially shrunken columns that ...
10.5 mm stainless steel eyelet ring for handbag,US $ 0.01 - 0.03 / Piece, Eyelets, Metal, Iron,aluminum, copper,stainless steel,etc., Round.Source from Foshan Vip Fashion Hardware Products Manufactory on Alibaba.com.
The long-term goal of this project is to delineate the signaling mechanisms of retinoic acid (RA) in the regulation of programmed cell death (PCD) during the ea...
Dresses-Lily Womens Dress Sz 12 Pink Floral Eyelet Lace Embroidered Sheath Pulitzer Hot nupcge1130-buy cheap new - www.kidemswheelsox.com
Find the training resources you need for all your activities. Studyres contains millions of educational documents, questions and answers, notes about the course, tutoring questions, cards and course recommendations that will help you learn and learn.
The saying Your eyes are bigger than your stomach means that people tend to take more food than they can or should eat. This...
But what sets Atmos apart from your average boutique is the amount of collabs that theyve been able to do. From the Nike Dunk x Art Force One x Atmos, to the super exclusive Nike Air Max 1 Premium Atmos, to collabs with Puma, K-Swiss, Reebok and New Balance, its hardly surprising that on any given day youll run into Method Man, Bobbito Garcia or Nate Robinson looking for Kicks ...
Im upgrading my strapping with some split rivets on the ab plate and kidney piece, and I wonder if the metal rings seen on the ANH suits, and the 1mm TM suits
Shift the eye position to 6 oclock position and hold for 2 seconds, and follow by 9 oclock and 3 oclock positions, holding each end positions for 2 seconds.Проследите за стрелкой, найдя положение 6 часов, затем - 9 часам и 3 часа. Задерживайте взгляд на 2 секунды в каждом положении. ...
Im selfish, impatient, and a little insecure. I make mistakes. I am out of control. And at times hard to handle. But if you cant handle me at my worst, then you sure as hell dont deserve me at my best.. ...
Its something just about every woman carries with them. While we may know whats inside our handbags, do you have any idea whats on the outside? Women carry handbags everywhere; from the office to public toilets to the floor of the car. Most women wont be caught without their handbags, but did you ever stop to think about where your handbag goes during the day ...
Our eyes are one of the most fascinating and complex parts of the body. Almost every animal in the animal kingdom relies on them everyday, but how much do we really know about eyes, and how they work?
Your eyes are precious so you should get any serious or persistent problems checked out quickly. Dr Melanie Wynne-Jones reveal possible causes for sore eyes...
The structure and function of compound eyes in crustaceans and insects has been the subject of intense study over the last 120 years (e.g. Exner, 1891; Horridge, 1975; Strausfeld, 2005; Warrant, 2006; Land and Nilsson, 2012); however, comparatively little is known about the ocelli (for reviews, see Goodman, 1981; Mizunami, 1995; Krapp, 2009). Adult winged insects usually have three ocelli on the frons or vertex, a median ocellus and two lateral ones - not to be confused with stemmata, which are sometimes termed lateral ocelli as well. From a morphological point of view, they are simple eyes in that they have a single lens. Ocelli are often more sensitive than compound eyes, because of a high convergence of photoreceptors onto secondary neurons, and the fewer neurons involved in processing the signals enable a faster response. The insight that the ocelli of some taxa are capable of any resolution at all is relatively recent (Schuppe and Hengstenberg, 1993; Stange et al., 2002; Berry et al., ...
Get information, facts, and pictures about compound eye at Encyclopedia.com. Make research projects and school reports about compound eye easy with credible articles from our FREE, online encyclopedia and dictionary.
PURPOSE: To investigate the association between ocular dominance and refraction. METHODS: A retrospective study of the cycloplegic refraction of 2453 consecutive patients with a mean age of 46 +/- 12 years (range: 18 to 79 years) was performed. One t
Looking for online definition of ommatidia in the Medical Dictionary? ommatidia explanation free. What is ommatidia? Meaning of ommatidia medical term. What does ommatidia mean?
Anterior Eye Segment information including symptoms, causes, diseases, symptoms, treatments, and other medical and health issues.
This lecture will discuss risks, benefits, sustainability, and cost as they relate to different species of seafood; gaps in the scientific literature; and the Long Island Study of Seafood Consumption, an ongoing study at Stony Brook University, to assess risks and benefits among avid fish consumers. Jaymie Meliker Choosing which types of seafood to eat is not simple, says Dr. Meliker. In addition to balancing cost and quality, as we do for all foods, the educated consumer might also consider sustainability of the fish species, and human health risks and benefits. Seafood provide important nutrients, most notably n-3 polyunsaturated fatty acids, which have been shown to confer benefits to brain and visual system development, and reduce risk of heart disease. However, seafood can also be a source of contaminants, perhaps most importantly, methylmercury, a known neurotoxicant ...
These silicone feeding tubes are great for adminis- tering medication and other fluids orally or nasally. All catheters are fully autoclavable. Lateral eyes are on distal tip. Hinged-attached cap. Sterile.. Tube. 5fr o.d. 1.7mm o.d. 35cm L.. ...
Ocelli Cream/Charcoal är en av många tyger från Sanderson ur kollektionen Madison Prints som finns att köpa på Tapetorama - Mängdrabatter - Personlig service - Beställ prover
My eyes are spent with weeping; my stomach churns; my bile is poured out to the ground because of the destruction of the daughter of my people, because infants and babies faint in the streets of the…
Burnt Orange Report is the leading source for progressive coverage of political news and issues that matter in Texas. Our Eyes Are Upon Texas Politics
My eyes are always slightly yellowish. People ask me to check if I have jaundice. I checked but I tested negative. So pls tell me what I should do to make th...
Yes I want to be the first to know about exclusive offers, collection previews and the latest style news from French Connection via email ...
In the compound eyes of the fruitflyDrosophila, the dioptric system of each ommatidium is able to form virtual images of the receptor terminals (rhabdomere
and i was struck with the neato microscopy images & highly specialized language & thot id make a post out of it & hopefully it wont offend any of the involved biologists & their work can be said to have poetic qualities as just about everything does but context is context & flyeyes are flyeyes. ...
Minnies eyes are very watery, she cant seem to keep them open and her nose is warm...shes snuggled next to me, which she rarely does......
Shop for Lost Ink Lost Ink Eyelet Peeptoe Wide Fit Ankle Boot at very.co.uk. Order online now and pay nothing for up to 12 months.
Our aging eyes are one of our most precious and critical organs-- but do we take care of them the way we should, or simply take them for granted?
‎My heart is so small its almost invisible. How can You place such big sorrows in it? Look, He answered, your eyes are even smaller, yet they behold the world.
... and ocular physiology G12 - chemical and pharmacologic phenomena G13 - genetic phenomena G14 - genetic structures H - Physical ... cell phenomena, and immunity G05 - genetic processes G06 - biochemical phenomena, metabolism, and nutrition G07 - physiological ... psychological phenomena and processes F03 - mental disorders F04 - behavioral disciplines and activities G - Biological ... Sciences G01 - biological sciences G02 - health occupations G03 - environment and public health G04 - biological phenomena, ...
Braid however criticizes Bertrand for explaining the magnetic phenomenon as caused by a mental state, the power of imagination ... whereas he explains them as being due to a physiological cause, the tiredness of the nerve centers related to a paralysis of ... the ocular apparatus. His contribution consists above all of proposing a new method of fascination based on concentrating on a ... and in 1842 the Academy of Sciences decided to stop investigating magnetic phenomenon. That did not prevent a great number of ...
Tear break-up time and ocular protection index assessment can be done to reveal dry eye. Exophthalmometry can be used to ... Physiological inability to close the eyelids during sleep (nocturnal lagophthalmos) may also cause exposure keratopathy. ... A weak bell phenomenon may result in exposure keratopathy after ptosis surgery. Postoperative lagophthalmos following ... It may occur secondary to ocular surgeries like blepharoplasty, ptosis surgery etc. also. Lagophthalmos, the inability to close ...
As he later wrote, Inasmuch as patients can throw themselves into the nervous sleep, and manifest all the usual phenomena of ... He postulated that "protracted ocular fixation" fatigued certain parts of the brain and caused a trance - a "nervous sleep" or ... Braid ascribed the "mesmeric trance" to a physiological process resulting from prolonged attention to a bright moving object or ... Hypnosis, which at the end of the 19th century had become a popular phenomenon, in particular due to Charcot's public hypnotism ...
Smith, George (1982). "Ocular defocus, spurious resolution and contrast reversal". Ophthalmic and Physiological Optics. 2 (1): ... Spurious resolution appears similar to aliasing, but it is a purely optical phenomenon, so it occurs without need of pixels.) ... Under optical blur from defocus, a Siemens star (like any periodic pattern) gives rise to the phenomenon of spurious resolution ...
A polemic between the two followed over whether this phenomenon was a symptom of what was then called "pseudo-leukemia" (Pel) ... In 1880, Pel was appointed Lecturer in Contagious Diseases and Physiological Diagnostics. In 1883 he became a full Professor of ... "tabetic ocular crisis". Pel shared the opinion of Sir William Osler, a contemporary of his, that the way to teach and train new ... or that of a separate disease (Ebstein). Pel also discovered what came to be called "Pel's crisis," defined as "Ocular crises ...
8 Ocular measurements *8.1 1.Optic nerve sheath diameter.. *8.2 2. Ophthalmodynamometry or the measurement of the retinal ... A measurable acoustic phenomenon that originates in the inner ear would, at least in theory, allow for more precise assessment ... The transfer function of this complex mechanical system under physiological conditions is modulated by the action of two small ... Ocular measurements[edit]. Eye provides another possible window into the pressure changes in the intracranial compartment ...
This is the physiological purpose of sun tanning. Dark-skinned people, who produce more skin-protecting eumelanin, have a ... Further, the ocular lens yellows with age, providing added protection. However, the lens also becomes more rigid with age, ... This phenomenon has been attributed in part to foveal sparing in macular degeneration. Albino Albinism in biology Griscelli ... Ocular albinism affects not only eye pigmentation but visual acuity, as well. People with albinism typically test poorly, ...
... anatomical and/or physiological explanation behind the phenomena. For example, in 1958 Dutch art historian De Wilde noted that ... This induced ocular disparity makes blue rays appear to come from a more distant source than red rays. Chromostereopsis may ... However, under monocular vision, this phenomenon is not observed. However, Bruecke objected to Einthoven's theory on grounds ... In 1885, Einthoven proposed a theory which states: "The phenomenon (chromostereopsis) is due to chromatic difference of ...
Niedermeyer, E. (1997). "Alpha rhythms as physiological and abnormal phenomena". International Journal of Psychophysiology. 26 ... Lins, Otavio G.; Picton, Terence W.; Berg, Patrick; Scherg, Michael (1993). "Ocular artifacts in EEG and event-related ... In 1875, Richard Caton (1842-1926), a physician practicing in Liverpool, presented his findings about electrical phenomena of ... Therefore, current usage in electroencephalography refers to the phenomenon as an eyelid fluttering artifact, rather than a ...
Niedermeyer, E. (1997). "Alpha rhythms as physiological and abnormal phenomena". International Journal of Psychophysiology. 26 ... Lins, Otavio G.; Picton, Terence W.; Berg, Patrick; Scherg, Michael (1993). "Ocular artifacts in EEG and event-related ... Therefore, current usage in electroencephalography refers to the phenomenon as an eyelid fluttering artifact, rather than a ... ISBN 978-0-7167-0110-1. Creutzfeldt, Otto D.; Watanabe, Satoru; Lux, Hans D. (1966). "Relations between EEG phenomena and ...
An integrated physiological risk model with blink frequency, destabilization, and break-up of the eye tear film as inseparable ... This phenomenon indicates that perceived eye irritation is associated with an increase in blink frequency since the cornea and ... Certain ocular diseases can come from sexually transmitted diseases such as herpes and genital warts. If contact between the ... phenomena may explain eye irritation among office workers in terms of occupational, climate, and eye-related physiological risk ...
Physiological nystagmus is a form of involuntary eye movement that is part of the vestibulo-ocular reflex (VOR), characterized ... Multiple sclerosis Optic nerve hypoplasia Pelizaeus-Merzbacher disease Superior canal dehiscence syndrome Tullio phenomenon ... The direction of ocular movement is related to the semicircular canal that is being stimulated. There are two key forms of ... Serra A, Leigh RJ (December 2002). "Diagnostic value of nystagmus: spontaneous and induced ocular oscillations". Journal of ...
The majority of current data comes from missions of short duration and so some of the long-term physiological effects of living ... Another effect is known as cosmic ray visual phenomena. ...[a] NASA survey of 300 male and female astronauts, about 23 percent ... Long spaceflights can also alter a space traveler's eye movements (particularly the vestibulo-ocular reflex). Because ... To prevent some of these adverse physiological effects, the ISS is equipped with two treadmills (including the COLBERT), and ...
It is not certain as to which is really the actual physiological phenomenon in each case. However, both cases can be modeled ... patterns of ocular dominance, and connection between nerve cell and muscle, and retinotopic maps. Carreira-Perpinan, M. A. & ... Another phenomenon of spike train generation happens in Type II neurons, where firing occurs at the resting potential threshold ...
Certain slight physiological deviations from Listing's rule are commonly described in terms of the "shape" and "thickness" of ... Note that this is not the same description of ocular torsion as rotation around the line of sight: whereas movements that start ... In the 1990s there was considerable debate about whether Listing's law is a neural or mechanical phenomenon. However, the ... either due to the Vestibulo-ocular reflex (VOR) or the optokinetic reflex. Here the eye simply rotates about approximately the ...
This phenomenon is supported by studies showing that if two stimuli are simultaneously applied to both sides of the body, the ... A patient is unable to coordinate ocular movement. A patient is unable to see objects on the left peripheral field. According ... In research by Denny-Brown and Banker, a disturbance in the physiological process of perceiving somatic sensations was termed ... This phenomenon is not observed in patients with complete extinction in which there is extensive damage to the parietal lobe, ...
The act of crying has been defined as "a complex secretomotor phenomenon characterized by the shedding of tears from the ... William James thought of emotions as reflexes prior to rational thought, believing that the physiological response, as if to ... lacrimal apparatus, without any irritation of the ocular structures", instead, giving a relief which protects from ...
Species with tetrachromatic color vision may have an unknown physiological advantage over rival species. The goldfish ( ... The biological basis for this phenomenon is X-inactivation of heterozygotic alleles for retinal pigment genes, which is the ... cone oil droplets and ocular media in four species of estrildid finch". Journal of Comparative Physiology A. 186 (7-8): 681-694 ...
Kromeier M, Heinrich SP, Bach M, Kommerell G (January 2006). "Ocular prevalence and stereoacuity". Ophthalmic & Physiological ... as lateral phenomena. Approximately 70% of the population are right-eye dominant and 29% left-eye dominant. Dominance does ... Ocular dominance, sometimes called eye preference or eyedness, is the tendency to prefer visual input from one eye to the other ... Ocular dominance column Right- and left-hand traffic Chaurasia BD, Mathur BB (1976). "Eyedness". Acta Anatomica. 96 (2): 301-5 ...
This phenomenon of activity-dependent competition is especially seen in the formation of ocular dominance columns within the ... Physiological changes in the brain are also conceivable causes for the terminus of the critical period for language acquisition ... The vestibulo-ocular reflex (VOR) is a reflex eye movement that stabilizes images on the retina during head movement. It ... As the first moving object they encountered, Lorenz studied the phenomenon in how quickly the geese were able to form such an ...
They also underlie the phenomenon of tickling. A motor signal from the central nervous system (CNS) to the periphery is called ... ISBN 978-0-470-26912-1. Wolpert, DM; Miall RC (1996). "Forward Models for Physiological Motor Control". Neural Networks. 9 (8 ... efference copy has an important role in maintaining gaze stability with active head movement by augmenting the vestibulo-ocular ... Essays in the History of Physiological Sciences: Proceedings of a Symposium Held at the University Louis Pasteur Strasbourg, on ...
While pain perception is a complex phenomenon involving multiple causes and multiple receptors including EP2, EP1, LTB4, ... Narumiya S, Sugimoto Y, Ushikubi F (1999). "Prostanoid receptors: structures, properties, and functions". Physiological Reviews ... "Ocular Hypotensive Effect of ONO-9054, an EP3/FP Receptor Agonist: Results of a Randomized, Placebo-controlled, Dose Escalation ... is in phase 1 clinical trial studies for the treatment of ocular hypertension and open-angle glaucoma. DG-041, a highly ...
Hearing: An introduction to psychological and physiological acoustics. 2nd edition. New York and Basel: Marcel Dekker, Inc. ... Dennis P. Carmody and Michael Lewis studied this phenomenon in 2006 and found that brain regions respond to the person's name ... and other factors relating to transmittance of the ocular media. The researchers estimated that 5 to 14 of the estimated 500 ... Hearing an Introduction to Psychological and Physiological Acoustics. Fourth edition. United States of America: Marcel Dekker ...
Dissociative phenomena are linked with micropsia, which may be the result of brain-lateralization disturbance. Micropsia is ... Michaeli-Cohen A, Almog Y, Loewenstein A, Stolovitch C, Gutman I, Lazar M (March 1996). "Presumed ocular myasthenia and ... However, more research is called for to correctly relate the condition to defined physiological conditions.[citation needed] ... Convergence-accommodative micropsia is a physiologic phenomenon in which an object appears smaller as it approaches the subject ...
Ideomotor phenomenon - A psychological phenomenon wherein a subject makes motions unconsciously. *Illusions of self-motion - A ... Sense of balance, also known as Equilibrioception - Physiological sense allowing animals to dynamically maintain an unstable ... that drives the vestibulo-ocular reflex (VOR). Glutamate maintains the resting discharge of the central vestibular neurons and ... Broken escalator phenomenon - The sensation of losing balance or dizziness when stepping onto an escalator which is not working ...
This phenomenon allows neural crest cells to funnel through the rostral portion of each somite. Semaphorin-neuropilin repulsive ... There are four different types of Waardenburg's syndrome, each with distinct genetic and physiological features. Types I and II ... tendons of ocular and masticatory muscles, connective tissue of head and neck glands (pituitary, salivary, lachrymal, thymus, ... This lack of innervation can lead to further physiological abnormalities like an enlarged colon (megacolon), obstruction of the ...
Strupp, M; Thurtell, MJ; Shaikh, AG; Brandt, T; Zee, DS; Leigh, RJ (July 2011). "Pharmacotherapy of vestibular and ocular motor ... Physiological sense allowing animals to dynamically maintain an unstable posture Spatial disorientation - Inability of a person ... Extreme or irrational fear of heights Broken escalator phenomenon - The sensation of losing balance or dizziness when stepping ... natural fear typical of most mammals Head for heights Ideomotor phenomenon - Concept in hypnosis and psychological research ...
These are described as "Small body tube, consisting of a field lens and two oculars with an adaptor to attach the tube to the ... In addition he worked with several professors in the private physiological institute as a technician, building various ... already investigated one requirement using glass reference gages to compare the curvature of lens surfaces using the phenomenon ... oculars and illumination. The objectives for these new compound microscopes were still empirically design but nonetheless met ...
They are synthesized in the walls of blood vessels and serve the physiological function of preventing needless clot formation, ... As a vasodilator in severe Raynaud's phenomenon or ischemia of a limb In pulmonary hypertension In treatment of glaucoma (as in ... bimatoprost ophthalmic solution, a synthetic prostamide analog with ocular hypotensive activity) (PGF2α) To treat erectile ...
... Information and translations of ocular physiological phenomena in the most ... Definition of ocular physiological phenomena in the Definitions.net dictionary. Meaning of ocular physiological phenomena. ... What does ocular physiological phenomena mean?. Definitions for ocular physiological phenomena. Here are all the possible ... Search for Song lyrics containing the word ocular physiological phenomena. *Search for ocular physiological phenomena on Amazon ...
3 SIMULTANEOUS USERS Eye Eye Diseases Ocular Physiological Phenomena Ophthalmologic Surgical Procedures Ophthalmology ...
Ocular Physiological Phenomena* * Retina / cytology * Retina / physiology * Retinal Cone Photoreceptor Cells / physiology ...
Ocular Physiological Phenomena * Photoreceptor Cells, Vertebrate / drug effects * Photoreceptor Cells, Vertebrate / pathology ... Glucagon prevented ocular elongation and myopia and induced choroidal thickening in form-deprived eyes. [Lys(17,18),Glu(21)]- ...
Ocular Physiological Phenomena*. Photic Stimulation. Reaction Time. Time Factors. Visual Perception / physiology*. ...
Menzel, R. and Backhaus, W. G. K. (1989). Color vision in honey bees: phenomena and physiological mechanisms. In Facets of ... Miller, W. H. (1979). Ocular optical filtering. In Handbook of Sensory Physiology, vol.VII/6A (ed. H. Autrum), pp.69 -143. ... Douglas, R. H. and Marshall, N. J. (1999). A review of vertebrate and invertebrate ocular filters. In Adaptive Mechanisms in ... ectopic expression and physiological characterization of the R8 photoreceptor cell-specific Rh5 and Rh6 rhodopsins. J. Neurosci ...
Eye, Adnexa oculi, Ocular Physiological Phenomena, sähkökirjat. Remington, Lee Ann. - Elsevier/Butterworth-Heinemann ... Cell Physiological Phenomena, Blood Cells, Heart, Electrocardiography, Cardiovascular Physiological Phenomena, Blood ... 1 SIMULTANEOUS USER, Physiology Pathological, Physiological Phenomena, Physiology, Physiological processes, MEDICAL Physiology ... Nervous System Physiological Phenomena, Gastrointestinal Tract, Sense Organs, Metabolic Phenomena, Body Temperature Regulation ...
Musculoskeletal and Neural Physiological Phenomena [G11]. *Nervous System Physiological Phenomena [G11.561]. *Nervous System ... "Reflex, Vestibulo-Ocular" is a descriptor in the National Library of Medicines controlled vocabulary thesaurus, MeSH (Medical ... This graph shows the total number of publications written about "Reflex, Vestibulo-Ocular" by people in Harvard Catalyst ... Nouri S, Karmali F. Variability in the Vestibulo-Ocular Reflex and Vestibular Perception. Neuroscience. 2018 11 21; 393:350-365 ...
Ocular Physiological Phenomena [G14]. *Flicker Fusion [G14.370]. Below are MeSH descriptors whose meaning is related to " ...
Ocular Physiological Phenomena [G14]. *Ocular Physiological Processes [G14.640]. *Accommodation, Ocular [G14.640.079] ... Loosely, it refers to ocular adjustments for VISION, OCULAR at various distances. (Cline et al., Dictionary of Visual Science, ... Ocular accommodation is the effecting of refractive changes by changes in the shape of the CRYSTALLINE LENS. ... "Accommodation, Ocular" is a descriptor in the National Library of Medicines controlled vocabulary thesaurus, MeSH (Medical ...
Phenomena and Processes CategoryMusculoskeletal and Neural Physiological PhenomenaNervous System Physiological PhenomenaReflex ... Reflex, Vestibulo-Ocular. A reflex wherein impulses are conveyed from the cupulas of the SEMICIRCULAR CANALS and from the ...
Ocular Physiological, Physical, Physiological, Plant Physiological, Reproductive and Urinary Physiological, .... - DISCIPLINES ... PHENOMENA AND PROCESSES: Biological, Cell Physiological, Chemical, Circulatory and Respiratory Physiological, Digestive System ... Integumentary System Physiological, Mathematical Concepts, Metabolic, Microbiological, Musculoskeletal and Neural Physiological ... ANTHROPOLOGY, EDUCATION, SOCIOLOGY AND SOCIAL PHENOMENA: Education, Human Activities, Social Sciences, .... - TECHNOLOGY, ...
This phenomenon, known as microsaccadic inhibition, or the microsaccadic signature, was first reported by Engbert & Kliegl [ ... Thus, little is known about the physiological or perceptual consequences of tremor on primate vision [4]. No studies to date, ... Scientists have pondered the perceptual effects of ocular motion, and those of its counterpart, ocular stillness, for over 200 ... Scientists have pondered the perceptual effects of ocular motion, and those of its counterpart, ocular stillness, for over 200 ...
MeSH G06 --- biochemical phenomena, metabolism, and nutrition * MeSH G07 --- physiological processes * MeSH G08 --- ... MeSH G11 --- musculoskeletal, neural, and ocular physiology * MeSH G12 --- chemical and pharmacologic phenomena ...
Ocular Physiological Phenomena * Amaurosis Fugax Carotid endarterectomy in a small community hospital: a team approach.. ... Ocular blood flow changes with increased vascular resistance external and internal to the eye. Schilder, P., 1989, In : Acta ... Ocular blood flow responses to pathology of the carotid and cerebral circulations. Schilder, P., 1994, In : Survey of ... Estimation of pulsatile ocular blood flow from intraocular pressure. Silver, D. M., Farrell, R. A., Langham, M. E., OBrien, V ...
Ocular Physiological Phenomena; Phenotype; Photoreceptor Cells; Vision, Ocular*; Zebrafish PubMed:. 16311625 Full text @ PLoS ...
in a phenomenon known as diabetic eye disease. Heres what you need to know about it, plus how to lower the odds it will happen ... Diabetic eye disease is an umbrella term used to describe several ocular health conditions.. A key condition in this group is ... It turns out that ripple effects from diabetes-induced high blood sugar can harm so many physiological systems, including the ... Ocular Surface Center and a professor of clinical ophthalmology at the University of Pennsylvania, tells SELF. ...
... of fundamental concepts in fluid and solid mechanics to better understand essential biological and physiological phenomena. ... Spanning a wide range, research in the Kamm lab has addressed issues in the respiratory, ocular and cardiovascular systems. ... He is the only living Honorary Member of Chinese Association of Physiological Sciences and IEEE EMBS. In 2009, he received the ... As the recent co-Chair of the Physiome Committee of the International Union of Physiological Sciences (IUPS) he has been ...
Local blood flow of the optic nerve head is organized by autoregulation [22]. Autoregulation is the physiological phenomenon in ... Ocular blood flow is an important factor in glaucomatous optic neuropathy and, together with ocular perfusion pressure, is ... A. P. Cherecheanu, G. Garhofer, D. Schmidl, R. Werkmeister, and L. Schmetterer, "Ocular perfusion pressure and ocular blood ... D. Schmidl, G. Garhofer, and L. Schmetterer, "The complex interaction between ocular perfusion pressure and ocular blood flow- ...
There is behavioral (Masson et al., 2000), psychophysical (Lorenceau et al., 1993), and physiological (Pack and Born, 2001) ... "barber pole phenomenon") has two components : an early (latency ∼85 msec) component driven only by grating motion, and a later ... 1991) Ocular responses to translation and their dependence on viewing distance. II. Motion of the scene. J Neurophysiol 66:865- ... 1997) Ocular responses to motion parallax stimuli : the role of perceptual and attentional factors. Vision Res 37:1627-1641. ...
In physiological terms, Patel (1993) defined crying is "a complex secretomotor phenomenon characterized by the shedding of ... tears from the lacrimal apparatus, without any irritation of the ocular structures". ... Reductionist theories Reductionists take a physiological approach to explain crying. When you cry, tears roll down your face. ... However, researchers suggested that crying at sad films has no positive effects; instead, it increases physiological arousals ( ...
... the temperature of human eyelids and of the ocular surface drops well below normal physiological levels. This may have a ... 2). Either of these two phenomena could compromise TFLL and TF in vivo, even in healthy, non-dry eye subjects. A combination of ... Petrov PG Thompson JM Rahman IB . Two-dimensional order in mammalian pre-ocular tear film. Exp Eye Res. 2007;84:1140-1146. [ ... Mathers W . Evaporation from the ocular surface. Exp Eye Res. 2004;78:389-394. [CrossRef] [PubMed] ...
In the ocular fundus the main structures responsible for the scattering (and absorption) of light are the melanin and the ... In physiological optics the term intraocular scattering refers to the elastic scattering of light when going through the eyes ... Scattering is a microscopic phenomenon related to the wave nature of light. In general, it refers to the deviation of light off ... The way scattering in the eye affects vision is very different from effects of other optical phenomena, such as aberrations ( ...
This implantable intraocular device, which can be used for the prevention of ocular degeneration and especially of the macular ... The device may be implanted either inside the ocular cavity or in contact with the eyeball. ... There is provided a compressible implant for the increase of ocular elasticity and the prevention of macular degeneration. ... The sequence of these phenomena leads in defective transfer of fluid and metabolites from the retina to the choroid through the ...
Exposure-assessment; Exposure-levels; Chemical-properties; Physiological-disorders; Physiological-factors; Physiological- ... This article (a) describes the basic anatomy and physiology of the human upper respiratory tract and ocular mucosae, (b) ... reviews practical means employed for assessing such phenomena, including psychophysical (e.g., threshold and suprathreshold ... Accurate assessment of upper respiratory tract and ocular irritation is critical for identifying and remedying problems related ...
Exposure-assessment; Exposure-levels; Chemical-properties; Physiological-disorders; Physiological-factors; Physiological- ... Terms: eye injur* OR eye burn* OR eye disorder* OR eye irrita* OR eye protect* OR vision disorder* OR ocular* OR ... reviews practical means employed for assessing such phenomena, including psychophysical (e.g., threshold and suprathreshold ... This article (a) describes the basic anatomy and physiology of the human upper respiratory tract and ocular mucosae, (b) ...
... and ocular physiology G12 - chemical and pharmacologic phenomena G13 - genetic phenomena G14 - genetic structures H - Physical ... cell phenomena, and immunity G05 - genetic processes G06 - biochemical phenomena, metabolism, and nutrition G07 - physiological ... psychological phenomena and processes F03 - mental disorders F04 - behavioral disciplines and activities G - Biological ... Sciences G01 - biological sciences G02 - health occupations G03 - environment and public health G04 - biological phenomena, ...
Braid however criticizes Bertrand for explaining the magnetic phenomenon as caused by a mental state, the power of imagination ... whereas he explains them as being due to a physiological cause, the tiredness of the nerve centers related to a paralysis of ... the ocular apparatus. His contribution consists above all of proposing a new method of fascination based on concentrating on a ... and in 1842 the Academy of Sciences decided to stop investigating magnetic phenomenon. That did not prevent a great number of ...
... disturbing ocular blood flow. Local and systemic factors known to change ocular blood flow include glaucoma, medications and ... It is unclear whether this is a primary change that causes secondary thinning of ocular tissues or quite the opposite; that is ... Techniques and tools assessing ocular blood flow include, among others, laser Doppler flowmetry (LDF), retinal function imager ... This paper presents a review of studies assessing ocular blood flow in myopes. ...
Ocular Physiological Phenomena. ... in both the development and maintenance of the phenomenon. ...
  • A program that focuses on the scientific study of the physiological processes involved in low and high-altitude flight and living in space and related low-pressure and low-gravity environments, including sensorimotor interactions, response mechanisms, and the effects of injury, disease, and disability. (edeps.org)
  • A program that focuses on the scientific study of physiological processes operating within and among cells, and intracellular communication and behavior, in the context of larger systems and whole organisms. (edeps.org)
  • King S, Benoit C, Bandealy N, Karmali F. The influence of target distance on perceptual self-motion thresholds and the vestibulo-ocular reflex during interaural translation. (harvard.edu)
  • Nouri S, Karmali F. Variability in the Vestibulo-Ocular Reflex and Vestibular Perception. (harvard.edu)
  • The vestibulo-ocular reflex ( VOR ) is a reflex eye movement that stabilizes images on the retina during head movement by producing an eye movement in the direction opposite to head movement, thus preserving the image on the center of the visual field. (en-academic.com)
  • In addition, systemic vascular factors like arterial hypertension and hypotension, cardiovascular diseases, vasospasms, and others have been identified to play a significant role in the disease as well as impaired ocular blood flow [ 1 - 3 ]. (hindawi.com)
  • The way scattering in the eye affects vision is very different from effects of other optical phenomena, such as aberrations (defocus, astigmatism, coma, etc.): scattering creates a veil of light, originating from the brighter parts in the image and causing a loss of contrast. (vision-research.eu)
  • During my PhD I studied a phenomenon called intraocular scattering and the effect it has on vision and fundus imaging. (vision-research.eu)
  • In physiological optics the term intraocular scattering refers to the elastic scattering of light when going through the eye's optical media and the ocular fundus. (vision-research.eu)
  • Local and systemic factors known to change ocular blood flow include glaucoma, medications and fluctuations in intraocular pressure, and metabolic parameters. (hindawi.com)
  • In the following section we explore the possible supplements and substances which may have an impact on intraocular pressure and/or serve as protection for the optic nerve and other ocular structures which are affected in glaucoma. (fiteyes.com)
  • In primates, short-latency ocular following responses help vision by stabilizing the image of the object of interest onto the retina (for review, see Miles, 1998 ). (jneurosci.org)
  • The central retinal artery (CRA) is the first branch of the ocular artery, an anatomically terminal artery supplying blood to the inner layers of the retina. (hindawi.com)
  • An ocular condition in which one eye uses the sensitive centre of the RETINA , while the other uses a more peripheral part, thereby conferring a crude form of binocular vision with a persistent AMBLYOPIA in the deviating eye that is harder to correct than amblyopia in the absence of ARC . (thefreedictionary.com)
  • One of the interesting aspects of the clinical manifestation of the infection is an accompanying ocular surface viral infection, viral conjunctivitis. (bvsalud.org)
  • Systemic blood pressure regulation and local mechanisms (autoregulation) need to maintain ocular blood flow at a constant level despite changes in perfusion pressure [ 4 , 5 ]. (hindawi.com)
  • Whether or not PES has extra-ocular physiological or even pathophysiological implications has been a matter of controversy for years. (mendeley.com)
  • The auto-immune disease MG affects the neuromuscular junction and commonly starts with weakness of the extra-ocular muscles (EOMs), causing double vision. (lumc.nl)
  • To probe the dynamics of 2D motion processing, we recorded in humans the short-latency, initial (open-loop) part of the ocular following responses elicited by different types of drifting plaids. (jneurosci.org)
  • Assessment of upper respiratory tract and ocular irritative effects of volatile chemicals in humans. (cdc.gov)
  • Assessment of upper respiratory tract and ocular irrita tive effects of volatile chemicals in humans. (cdc.gov)
  • Scientists have pondered the perceptual effects of ocular motion, and those of its counterpart, ocular stillness, for over 200 years. (royalsocietypublishing.org)
  • In 1794, Erasmus Darwin documented that gaze fixation produces perceptual fading, a phenomenon rediscovered in 1804 by Ignaz Paul Vital Troxler. (royalsocietypublishing.org)
  • Yet, owing to the constant and minute nature of these motions, the study of their perceptual and physiological consequences has met significant technological challenges. (royalsocietypublishing.org)
  • Here, we review the existing data-from historical and contemporary studies that have aimed to nullify or minimize eye motion-on the perceptual and physiological consequences of perfect versus imperfect fixation. (royalsocietypublishing.org)
  • Elucidation of this phenomenon could hold help the development of new therapies, by changing the constitution of muscles that are involved early in the disease process to resemble muscles that are preserved longest, for instance by enhancing intrinsic properties of these preserved muscles. (lumc.nl)
  • We will assess exercise-physiological, micro-structural and molecular differences between muscles to identify factors that contribute to preserving muscle tissue until late in disease progression. (lumc.nl)
  • Yet other research has taken the alternative tack to control eye motion by behavioural instruction to fix one's gaze or to keep one's gaze still, during concurrent physiological and/or psychophysical measurements. (royalsocietypublishing.org)
  • Physiological inability to close the eyelids during sleep (nocturnal lagophthalmos) may also cause exposure keratopathy. (wikipedia.org)
  • Chemical or thermal burns to eyelids or conjunctiva, ocular cicatricial pemphigoid, or symblepharon may cause incomplete or inadequate eyelid closure. (wikipedia.org)
  • There is evidence that, in cold conditions, the temperature of human eyelids and of the ocular surface drops well below normal physiological levels. (arvojournals.org)
  • With the scleral search coil technique, we recorded ocular following responses elicited by either grating or plaid pattern motions. (jneurosci.org)
  • We demonstrate that these two types of motion signals are processed independently, with different latencies, but are combined together so that at the end of the open-loop period of ocular following responses, the 2D tracking direction can be predicted by a vector combination calculation. (jneurosci.org)
  • In the ocular fundus the main structures responsible for the scattering (and absorption) of light are the melanin and the haemoglobin, located posterior to the photoreceptors in the Retinal Pigment Epithelium (RPE) and in the choroid. (vision-research.eu)
  • The lacrimal functional unit is a self-contained integrated system comprising the ocular surface (cornea, conjunctiva and meibomian glands) and the lids, which is linked directly to primary and accessory lacrimal glands with a feedback connective loop that includes both motor and sensory nerves. (reviewofoptometry.com)
  • Glucagon prevented ocular elongation and myopia and induced choroidal thickening in form-deprived eyes. (nih.gov)
  • Myopia is the most common refractive error and the subject of interest of various studies assessing ocular blood flow. (hindawi.com)
  • Disorders of ocular blood flow in myopia have still not been fully explained and are quite rarely described in the literature. (hindawi.com)
  • Therefore, the authors reviewed the literature with a focus on currently used diagnostic methods used for the analysis of changes in the haemodynamics of ocular blood flow in subjects with myopia. (hindawi.com)
  • This is a good rule to follow even if you don't think you have diabetes, Mina Massaro-Giordano, M.D., co-director of the Penn Dry Eye & Ocular Surface Center and a professor of clinical ophthalmology at the University of Pennsylvania, tells SELF. (uweightloss.com)
  • This phenomenon is common in strabismus, but may also occur as a result of a macular lesion. (thefreedictionary.com)
  • At the peak of the sensitive period, it is possible to reverse completely the cortical ocular dominance to favor the OD eye, even when the initial MD was initiated at eye-opening. (jneurosci.org)
  • Ocular dominance can be modified by visual input and NEUROTROPHIC FACTORS. (sickkids.ca)
  • The discrepancy between the theoretically expected high rate of concurrence of viral ocular surface inflammation and the observed relatively low occurrence can be explained by several factors. (bvsalud.org)
  • In turn, a vicious cycle develops in which inflammation amplifies and fosters further damage to the ocular surface by chronic deregulation of the lacrimal functional unit and tear composition. (reviewofoptometry.com)
  • The first step of my research was a theoretical study of the spatial and spectral characteristics of scattering in ocular fundus and a comparison with scattering at the ocular media from experimental data. (vision-research.eu)
  • Reflex, Vestibulo-Ocular" is a descriptor in the National Library of Medicine's controlled vocabulary thesaurus, MeSH (Medical Subject Headings) . (harvard.edu)
  • This graph shows the total number of publications written about "Reflex, Vestibulo-Ocular" by people in Harvard Catalyst Profiles by year, and whether "Reflex, Vestibulo-Ocular" was a major or minor topic of these publication. (harvard.edu)
  • Below are the most recent publications written about "Reflex, Vestibulo-Ocular" by people in Profiles. (harvard.edu)
  • It has been shown that low ocular perfusion pressure is a risk factor for the prevalence of glaucoma. (hindawi.com)
  • There is much interest in natural supplements with those who have been diagnosed with glaucoma or ocular hypertension (OHT). (fiteyes.com)
  • Specifically, we advance the hypothesis that the standing potential of the eye plays an important role in repelling aerosol particles (microdroplets) from the surface of the eye and discuss factors associated with this hypothesis, possible ways to test it and its implications in terms of prevention of ocular infections. (bvsalud.org)
  • Increasing refractive error and axial elongation of the eye result in the stretching and thinning of the scleral, choroid, and retinal tissues and the decrease in retinal vessel diameter, disturbing ocular blood flow. (hindawi.com)
  • At the request of the Parish Office of Međugorje, psycho-physiological and psycho-diagnostic research was carried out on the subjects who since 1981 are known as the visionaries' group of Međugorje. (medjugorje.ws)
  • In this context, disturbed vascular regulation may increase the susceptibility of the optic nerve and the ganglion cells to fluctuations in ocular perfusion pressure. (hindawi.com)
  • Steroid-induced ocular hypertension in normal cattle. (mssm.edu)
  • Accurate assessment of upper respiratory tract and ocular irritation is critical for identifying and remedying problems related to overexposure to volatile chemicals, as well as for establishing parameters of irritation useful for regulatory purposes. (cdc.gov)
  • In 1875, Richard Caton (1842-1926), a physician practicing in Liverpool , presented his findings about electrical phenomena of the exposed cerebral hemispheres of rabbits and monkeys in the British Medical Journal . (wikipedia.org)
  • Tear break-up time and ocular protection index assessment can be done to reveal dry eye. (wikipedia.org)
  • A novel in vitro model that mimics tear flow across the ocular surface has been successfully developed, which can be used for determining drug release from CLs. (arvojournals.org)
  • Under low volume at physiological tear flow, commercial CLs can maintain a sustained drug release profile for up to 24 hrs, suggesting their potential as ocular drug delivery devices. (arvojournals.org)
  • In blood flow disorders affecting the ocular artery, blood may be supplied to the eyeball by an anastomosis between the middle meningeal and the lacrimal arteries and between the angular and dorsal nasal arteries. (hindawi.com)
  • Loosely, it refers to ocular adjustments for VISION, OCULAR at various distances. (umassmed.edu)
  • Clarity or sharpness of OCULAR VISION or the ability of the eye to see fine details. (rush.edu)
  • Ocular accommodation is the effecting of refractive changes by changes in the shape of the CRYSTALLINE LENS. (umassmed.edu)