Functional and anatomical profile of visual motion impairments in stroke patients correlate with fMRI in normal subjects.

ABSTRACT: We used six psychophysical tasks to measure sensitivity to different types of global motion in 45 healthy adults and in 57 stroke patients who had recovered from the initial results of the stroke, but a large subset of them had enduring deficits on selective visual motion perception tasks. The patients were divided into four groups on the basis of the location of their cortical lesion: occipito-temporal, occipito-parietal, rostro-dorsal parietal, or frontal-prefrontal. The six tasks were: direction discrimination, speed discrimination, motion coherence, motion discontinuity, two-dimensional form-from-motion, and motion coherence - radial. We found both qualitative and quantitative differences among the motion impairments in the four groups: patients with frontal lesions or occipito-tempora

SUBMITTER: Vaina LM 

PROVIDER: S-EPMC2935516 | biostudies-literature | 2010 Sep

REPOSITORIES: biostudies-literature