A transient deficit of motion perception in human

We studied the motion perception abilities in a young adult, SF, who had he r right occipito-temporal cortices resected to treat epilepsy. Following re section, SF showed transient deficits of both first- and second-order motio n perception that recovered to normal within weeks. Previous human studies have shown either first- or second n order motion deficits that have lasted months or years after cerebral damage. SF also showed a transient defect i n processing of shape-from-motion with normal perception of shape from non- motion cues. Furthermore, she showed greatly increased reaction times for a mental rotation task, but not for a lexical decision task. The nature and quick recovery of the deficits in SF resembles the transient motion percept ion deficit observed in monkey following ibotenic acid lesions, and provide s additional evidence that humans possess specialized cortical areas subser ving similar motion perception functions. (C) 2000 Elsevier Science Ltd. Al l rights reserved.