visual cortex


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Related to visual cortex: auditory cortex

cortex

 [kor´teks] (pl. cor´tices) (L.)
the outer layer of an organ or other structure, as distinguished from its inner substance or medulla. adj., adj cor´tical.
adrenal cortex (cortex of adrenal gland) the outer, firm layer comprising the larger part of the adrenal gland; it secretes mineralocorticoids, androgens, and glucocorticoids.
cerebellar cortex the superficial gray matter of the cerebellum.
cerebral cortex (cortex cerebra´lis) the convoluted layer of gray matter covering each cerebral hemisphere. See also brain.
renal cortex the granular outer layer of the kidney, composed mainly of glomeruli and convoluted tubules, extending in columns between the pyramids that constitute the renal medulla.
striate cortex part of the occipital lobe that receives the fibers of the optic radiation and serves as the primary receiving area for vision. Called also first visual area.
visual cortex the area of the occipital lobe of the cerebral cortex concerned with vision; the striate cortex is also called the first visual area, and the adjacent second and third visual areas serve as its association areas.

vis·u·al cor·tex

the region of the cerebral cortex occupying the entire surface of the occipital lobe, and composed of Brodmann areas 17-19. Brodmann area 17 (which is also called striate cortex or area because the line of Gennari is grossly visible on its surface) is the primary visual cortex, receiving the visual radiation from the lateral geniculate body of the thalamus. The surrounding Brodmann areas 18 (parastriate cortex or area) and 19 (peristriate cortex or area) are probably involved in subsequent steps of visual information processing; Brodmann area 18 is referred to as the secondary visual cortex.
Synonym(s): visual area

vis·u·al cor·tex

(vizh'ū-ăl kōr'teks)
The region of the cerebral cortex occupying the entire surface of the occipital lobe, and composed of Brodmann areas 17-19. Area 17 (which is also called the striate cortex or area because the line of Gennari is grossly visible on its surface) is the primary visual cortex, receiving the visual radiation from the lateral geniculate body of the thalamus. The surrounding Brodmann areas 18 (parastriate cortex or area) and 19 (peristriate cortex or area) are probably involved in subsequent steps of visual information processing; area 18 is referred to as the secondary visual cortex.
Synonym(s): visual area.

visual cortex

the thin outer layer of grey matter in the occipital region of the CEREBRUM that is concerned with the interpretation of information from the eyes.

visual

pertaining to vision.

visual acuity test
performed by walking the animal through an obstacle course. A room full of unfamiliar furniture, or a stairway is usually used for companion animals. Farm animals are led or driven through a passage with drums or boxes strewn across it.
visual cortex
the part of the cerebral cortex which deals with images received by the visual apparatus.
visual evoked potentials (VEPs)
see visual evoked response.
visual following
movement of the eyes in watching a moving object.
visual pathway
the bulk of the retinal ganglion cells have axons in the optic nerve which synapse with cells in the lateral geniculate nucleus in the thalamus, which project to the visual cortex in the occipital lobe of the cerebrum; in a secondary visual pathway the axons of the remainder of the retinal ganglion cells terminate in the anterior rostral colliculus (pretectal region).
visual system
includes the eye, the optic nerve and the optic cortex in the cerebrum. The oculomotor, trochlear, abducent, trigeminal and facial nerves are all involved in reflexes which are part of the animal's responses to visual stimuli.
visual yellow
all-trans retinal; see retinal (2).
References in periodicals archive ?
In the medial view, the black dotted line highlights the calcarine sulcus, where the primary visual cortex is located.
Plasticity of GFAP-immunoreactive astrocyte size and number in visual cortex of rats reared in complex environments.
According to Rokers, a group of neurons in the visual cortex called the striate cortex, or V1, is handling two sets of pictures from our eyes -- one view each from the left eye and the right eye.
Using a special algorithm that can identify unique patterns in brain activity, the researchers were able to discriminate between the different sounds being processed in early visual cortex activity.
We build pretty detailed models of the visual cortex and study specific properties of the microcircuits," he said.
Complete removal of the visual cortex on one side of the brain renders animals unable to see anything in the half of the visual field opposite the surgical site.
40) reported that developmental exposure to PCB 77 blocked LTP in visual cortex but not hippocampus.
The size of the eye and its delicacy, however, makes Loeb think that implants directly onto the brain's visual cortex - also under research - stand a better chance.
These implants would be used to stimulate electronically a person's visual cortex, the part of the brain responsible for processing and analyzing light.
These results are very exciting and suggest that the visual cortex contains finer category-selective subdivisions than previously believed," said Brad Duchaine, PhD, of the Institute of Cognitive Neuroscience at University College London, who was not involved in the research.
When newborn babies open their eyes for the first time, they already possess nerve cells specialized in particular stimuli in the visual cortex of their brains - but these nerve cells are not systematically linked with each other.