What are the Extrastriate areas?

The extrastriate cortex is the part of the visual cortex that is located next to the striate cortex. The extrastriate cortex consists of multiple brain areas involved in processing specific features of visual information.

What lobe is the extrastriate cortex in?

The occipital lobe contains a large number of extrastriate visual cortical areas that have been previously attributed to occipital architectonic areas 18 and 19 of Brodmann [3] or areas OA, OB, OC of von Bonin and Bailey [4].

What is the areas of visual cortex?

The visual cortex of the brain is the area of the cerebral cortex that processes visual information. It is located in the occipital lobe. Sensory input originating from the eyes travels through the lateral geniculate nucleus in the thalamus and then reaches the visual cortex.

What is area V3 responsible for?

Visual Area Three (V3) V3 communicated directly with the respective dorsal and ventral subsystems of V2. Dorsal V3 seems to play a role in processing motion, while ventral V3 may play a role in color sensitivity. V3 as a whole is less well-defined compared to other areas of the visual cortex.

What is Retinotopic mapping?

Retinotopy (also known as retinal mapping) is the mapping of visual information from the retina to neurons in the brain. The connections between different parts of the brain that deal with visual input are elegantly connected to form a retinotopic map of the visual field.

Which is the correct order of the visual pathway?

The visual pathway consists of the retina, optic nerves, optic chiasm, optic tracts, lateral geniculate bodies, optic radiations, and visual cortex.

What is the difference between the visual cortex and the Extrastriate cortex?

Primary visual cortex (V1) is also named striate cortex because of its striped appearance in the microscope. The extrastriate cortex encompasses multiple functional areas, including V3, V4, V5/MT, which is sensitive to motion, or the extrastriate body area (EBA) used in the perception of human bodies.

What is the importance of visual cortex?

In other words, the right cortical areas process information from the left eye, and the left processes information from the right eye. The primary purpose of the visual cortex is to receive, segment, and integrate visual information.

Where is the visual cortex located in the brain?

occipital lobe
The primary visual cortex is found in the occipital lobe in both cerebral hemispheres.

What happens if the primary visual cortex is damaged?

In a nutshell: Even if the primary visual cortex is damaged — causing blindness — the pathway that transmits visual information from the retina is not completely destroyed. The penultimate stop on the pathway still processes visual information, even if it has nowhere to go.

Is V1 retinotopic?

Area V1 has retinotopic organization, meaning that it contains a complete [map of the visual field | visual map] covered by the two eyes. In most species V1 is considered to have a single map of the visual field, but in cats it contains two of them: one for area 17 and one for area 18.

Where does retinotopic mapping happen?

Retinotopic maps are present in the visual areas of lower mammals such as rats and squirrels but other properties, such as ocular dominance and preferred orientation appear to vary randomly with position (Van Hooser et al., 2005).

What are the parts of the extrastriate cortex?

Anatomy. In primates, the extrastriate cortex includes visual area V3, visual area V4, and visual area MT (sometimes called V5), while V1 corresponds to the striate cortex, and V2 to the prestriate cortex.

Where is the extrastriate visual cortex located in the marmoset?

Area MT is an extrastriate visual cortex that is involved in processing visual motion. Compared with most primate species, the entire extent of area MT in the marmoset brain is exposed on the gyrus.

What is the extrastriate body area in psychology?

The extrastriate body area is a category-selective region for the visual processing of static and moving images of the human body and parts of it. It is also modulated even in the absence of visual feedback from the limb movement. It is insensitive to faces and stimulus categories unrelated to the human body.

How are the lip and FEF connected to the extrastriate cortex?

The LIP and FEF receive strong converging inputs from dorsal and ventral stream extrastriate areas and in turn send feedback to these areas. Consistent with these anatomical connections, LIP and FEF neurons have visual responses and circumscribed receptive fields similar to neurons in extrastriate areas.