Visual motion perception after brain damage: I. Deficits in global motion perception.
We report on the test results of a group of 32 mostly unilaterally brain-damaged patients examined for global visual motion perception. Three of these patients had severely impaired visual motion perception in their contralateral visual half-field, a deficit remarkably similar to the perceptual defects found in V5-lesioned monkeys. Two of these three patients had a right-hemisphere lesion; the remaining one had a left-hemisphere lesion. We conclude that both hemispheres of the human brain contain an area, functionally equivalent to V5, which subserves visual motion perception in the contralateral visual half-field. Lesion analysis revealed that this area is located in the posterior medial temporal gyrus.
Schenk
T
T
Klinikum Grosshadern, Ludwig-Maximilians-Universität, Munich, Germany.
Zihl
J
J
D000328:Adult; D000368:Aged; D001930:Brain Injuries / Q000000981:diagnostic imaging* / Q000209:etiology*; D005260:Female; D007839:Functional Laterality; D006801:Humans; D008297:Male; D008875:Middle Aged; D009039:Motion Perception; D009483:Neuropsychological Tests; D010468:Perceptual Disorders / Q000175:diagnosis* / Q000209:etiology*; D012720:Severity of Illness Index; D013702:Temporal Lobe / Q000000981:diagnostic imaging*; D014057:Tomography, X-Ray Computed; D014793:Visual Cortex / Q000000981:diagnostic imaging*; D014794:Visual Fields; D014796:Visual Perception