Akinetopsia is a specific inability to see objects in motion, the perception of other visual attributes, such as color, form, and depth, remaining intact. This statokinetic dissociation may be known as Riddoch’s phenomenon; the syndrome may also be called cerebral visual motion blindness. Such cases, although exceptionally rare, suggest a distinct neuroanatomical substrate for movement vision, as do cases in which motion vision is selectively spared in a scotomatous area (Riddoch’s syndrome).
Akinetopsia reflects a lesion selective to area V5 of the visual cortex. Clinically it may be associated with acalculia and aphasia.
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