Visual agnosia
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Clinic
- Visual agnosia is a broad category that refers to a deficiency in the ability to recognize visual objects.
- It can be subdivided into two different subtypes:
- Apperceptive visual agnosia: They display the ability to see contours and outlines when shown an object, but they experience difficulty if asked to categorize objects. It is associated with damage to one hemisphere, specifically damage to the posterior sections of the right hemisphere.
- Sssociative visual agnosia: They experience difficulty when asked to name objects. Associative agnosia is associated with damage to both the right and left hemispheres at the occipitotemporal border.
- A specific form of associative visual agnosia is known as prosopagnosia.