Binocular visual mechanisms in cortical areas I and II of the sheep.

Details

Serval ID
serval:BIB_2FE9F15F0112
Type
Article: article from journal or magazin.
Collection
Publications
Title
Binocular visual mechanisms in cortical areas I and II of the sheep.
Journal
Journal of Physiology
Author(s)
Clarke P.G., Donaldson I.M., Whitteridge D.
ISSN
0022-3751 (Print)
ISSN-L
0022-3751
Publication state
Published
Issued date
1976
Peer-reviewed
Oui
Volume
256
Number
3
Pages
509-526
Language
english
Notes
Publication types: Journal Article
Publication Status: ppublish
Abstract
1. Units were recorded in the primary and secondary visual areas (V1 and V2) of the sheep. They were stimulated binocularly, using an adjustable prism to vary the disparity. 2. Cells in V1 responded optimally to stimuli with very small or zero disparities, but cells in V2 frequently preferred disparities of several degrees crossed or uncrossed. Many cells in V2 were particularly selective to disparity, often giving no response to a monocular stimulus. 3. Cells preferring the same disparity occur in discrete columns, about 400 muM wide. Changes between columns result from a step displacement of the receptive field of one eye. The disparities encoded in successive columns seem to follow a regular sequence: crossed, zero, uncrossed, zero, etc. 4. In both V1 and V2, cells are clustered, perhaps in columns, according to their orientation preference and ocular dominance. In V2, the constant disparity columns appear to be independent of the orientation clusters.
Keywords
Animals, Brain Mapping, Depth Perception/physiology, Evoked Potentials, Orientation, Retina/physiology, Sheep/physiology, Vision, Ocular, Visual Cortex/anatomy & histology, Visual Cortex/physiology
Pubmed
Web of science
Create date
20/01/2008 17:48
Last modification date
20/08/2019 13:14
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