Hemispheric lateralization of spatial contrast sensitivity

Visuospatial contrast sensitivity was determined by the Arden grating chart in 23 patients with cerebral infarctions involving the primary visual cortex or visual association cortex. Subjects were classified into three groups according to their lesions: I, 6 patients with unilateral medial occipital...

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Bibliographic Details
Published in:	Annals of neurology Vol. 17; no. 2; p. 141
Main Authors:	Kobayashi, S, Mukuno, K, Ishikawa, S, Tasaki, Y
Format:	Journal Article
Language:	English
Published:	United States 01-02-1985
Subjects:	Adult Aged Agnosia - etiology Agnosia - physiopathology Cerebral Infarction - complications Cerebral Infarction - physiopathology Dominance, Cerebral - physiology Female Humans Male Middle Aged Parietal Lobe - blood supply Visual Cortex - blood supply Visual Cortex - physiology Visual Perception - physiology
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Summary:	Visuospatial contrast sensitivity was determined by the Arden grating chart in 23 patients with cerebral infarctions involving the primary visual cortex or visual association cortex. Subjects were classified into three groups according to their lesions: I, 6 patients with unilateral medial occipital or occipitotemporal lesions; II, 6 patients with left lateral parieto-occipital lesions; and III, 11 patients with right lateral parieto-occipital lesions. Contrast sensitivity was markedly reduced in Group III, especially in patients having hemispatial agnosia. Group I patients with hemispatial agnosia showed almost normal contrast sensitivity. Spatial contrast sensitivity appears to be more affected when the lesion has an influence on the nondominant lateral parieto-occipital cortex.
ISSN:	0364-5134
DOI:	10.1002/ana.410170207