Visual Cortex

The visual cortex of the brain is the part of the cerebral cortex responsible for processing visual information. It is located in the occipital lobe, in the back of the brain.

The term visual cortex refers to the primary visual cortex (also known as striate cortex or V1) and extrastriate visual cortical areas such as V2, V3, V4, and V5. The primary visual cortex is anatomically equivalent to Brodmann area 17, or BA17. The extrastriate cortical areas consist of Brodmann area 18 and Brodmann area 19.

There is a visual cortex in each hemisphere of the brain. The left hemisphere visual cortex receives signals from the right visual field and the right visual cortex from the left visual field.

The body of this article describes the primate (especially, human) visual cortex.

Read more about Visual Cortex:  Introduction, Primary Visual Cortex (V1), V2, Third Visual Complex, Including Area V3, V4, V5/MT

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Eşref Armağan
... He is also able to create art that has visual perspective ... Both scientists had evidence that in cases of blindness, the "visual" cortex acts differently than how it acts with the non-blind ... analyzed the results, however, he found that Armagan's visual cortex lit up during the drawing task, but hardly at all for verbal recall, meaning that some unused visual areas might be ...
Activity-dependent Plasticity - Structures and Pathways Involved
... Nearly every cortex and region within the brain is involved in its plasticity feature since most regions are capable of adopting other regions’ functions based on relative use and the “rewiring” of the ... Activity-dependent plasticity is even seen in the primary visual cortex, a region of the brain that processes visual stimuli and is capable of modifying the experienced stimuli based on active sensing and arousal states ... By experimentation on Long Evans rats, it was found that visual experience during vigilant states leads to increased responsiveness and plastic changes in the visual cortex ...
Spatial Frequency - Visual Perception - Spatial-frequency Theory
... The spatial-frequency theory refers to the theory that the visual cortex operates on a code of spatial frequency, not on the code of straight edges and lines hypothesised by Hubel and Wiesel ... In support of this theory is the experimental observation that the visual cortex neurons respond even more robustly to sine-wave gratings that are placed at specific angles in ... Most neurons in the primary visual cortex respond best when a sine-wave grating of a particular frequency is presented at a particular angle in a ...
Cerebral Cortex - Layered Structure
... examples of cortical layering is the Stria of Gennari in the primary visual cortex ... Gennari is composed of axons bringing visual information from the thalamus into layer four of visual cortex ... Staining cross-sections of the cortex to reveal the position of neuronal cell bodies and the intracortical axon tracts allowed neuroanatomists in ...
Hallucinated - Pathophysiology
... VISUAL There are 3 pathophysiologic mechanisms thought to account for complex visual hallucinations theses mechanisms consist of the following The first mechanism involves irritation of cortical centers ... The irritation of the primary visual cortex causes simple elementary visual hallucinations ... involves lesions that cause deafferentation of the visual system may lead to cortical release phenomenon, which includes visual hallucination ...

Famous quotes containing the word visual:

    Unlike any other visual image, a photograph is not a rendering, an imitation or an interpretation of its subject, but actually a trace of it. No painting or drawing, however naturalist, belongs to its subject in the way that a photograph does.
    John Berger (b. 1926)