Document Detail

Processing of color, form and disparity information in visual areas VP and V2 of ventral extrastriate cortex in the macaque monkey.
MedLine Citation:
PMID:  3746412     Owner:  NLM     Status:  MEDLINE    
The responses of single cells to light bars of different orientation, direction of motion, speed, binocular disparity, and wavelength were systematically analyzed in areas V2 and VP of ventral extrastriate visual cortex in the macaque monkey. Selectivity for each of these parameters was assessed quantitatively using computer-controlled procedures. In both VP and V2 (both representing the superior contralateral quadrant), more than half of the cells studied were selective for stimulus color and more than half for stimulus orientation. In contrast, only a small minority of the VP and V2 cells were selective for the direction of stimulus motion. Comparison with reports of single-unit properties in dorsal extrastriate cortex suggests there are no major differences in the incidence of orientation, direction, and color selectivity between ventral and dorsal subdivisions of V2. Between V3 and VP, though, there are marked differences: Color-selective cells are much less common in V3 than VP, whereas direction-selective cells are more common in V3. This dorsoventral difference in the distribution of neuronal response properties suggests a significant asymmetry in the way visual information is processed in upper and lower parts of the visual field. The properties of cells in VP suggest that it plays an important role in both form and color vision, similar to that attributed to area V4.
A Burkhalter; D C Van Essen
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  The Journal of neuroscience : the official journal of the Society for Neuroscience     Volume:  6     ISSN:  0270-6474     ISO Abbreviation:  J. Neurosci.     Publication Date:  1986 Aug 
Date Detail:
Created Date:  1986-10-02     Completed Date:  1986-10-02     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  8102140     Medline TA:  J Neurosci     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  2327-51     Citation Subset:  IM; S    
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MeSH Terms
Color Perception / physiology
Macaca fascicularis
Visual Cortex / physiology*
Visual Perception / physiology*
Grant Support

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