| Deficits in speed discrimination following lesions of the lateral suprasylvian cortex in the cat. | |
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MedLine Citation:
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PMID: 2487113 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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We examined the role of the lateral suprasylvian (LS) cortex in motion perception by testing the ability of three cats to detect moving targets and to discriminate differences in stimulus direction and speed before and after making bilateral ibotenic acid lesions in LS. The lesions had little or no effect on contrast sensitivity for detecting moving sinusoidal gratings. Moreover, we found no deficits in discriminating opposite directions of motion: the cats discriminated grating directions at threshold contrasts. All three cats, however, showed permanent deficits in discriminating differences in speed and in flicker rate. The deficits were most pronounced at higher temporal and spatial frequencies and at lower contrasts. This result suggests that LS plays an important role in the analysis of stimulus speed. It appears that information needed for discriminating opposite directions of motion may be signalled by visual areas outside LS. |
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Authors:
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T Pasternak; K M Horn; J H Maunsell |
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Publication Detail:
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Type: Journal Article; Research Support, U.S. Gov't, P.H.S. |
Journal Detail:
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Title: Visual neuroscience Volume: 3 ISSN: 0952-5238 ISO Abbreviation: Vis. Neurosci. Publication Date: 1989 Oct |
Date Detail:
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Created Date: 1991-03-13 Completed Date: 1991-03-13 Revised Date: 2007-11-14 |
Medline Journal Info:
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Nlm Unique ID: 8809466 Medline TA: Vis Neurosci Country: ENGLAND |
Other Details:
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Languages: eng Pagination: 365-75 Citation Subset: IM; S |
Affiliation:
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Department of Neurobiology, University of Rochester, NY 14627. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Brain Mapping Cats Electrophysiology Flicker Fusion / physiology Ibotenic Acid / diagnostic use Motion Perception / physiology* Motor Activity Psychophysics Visual Cortex / pathology, physiology* |
| Grant Support | |
ID/Acronym/Agency:
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EY01319/EY/NEI NIH HHS; EY06175/EY/NEI NIH HHS; T32 MH18260/MH/NIMH NIH HHS |
| Chemical | |
Reg. No./Substance:
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2552-55-8/Ibotenic Acid |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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