Akinetopsia

Akinetopsia, also called cerebral akinetopsia or motion blindness, is an extremely rare neuropsychological disorder in which a person cannot perceive motion in their visual field even though their ability to see stationary objects remains normal. It results from damage to visual area V5/MT, the part of the brain specialized for detecting the direction of movement, and can also be produced experimentally by transcranial magnetic stimulation, or occur in Alzheimer's disease or after high doses of certain antidepressants. Severity varies widely: in milder cases people describe motion as a series of still photographs, while in the most severe documented case a patient found even pouring a drink difficult because the liquid appeared to be frozen like a glacier. There is currently no effective treatment. This description is adapted from Wikipedia contributors under CC BY-SA 4.0; changes were made. https://creativecommons.org/licenses/by-sa/4.0/