Journal
JOURNAL OF NEUROSCIENCE
Volume 28, Issue 32, Pages 8096-8106Publisher
SOC NEUROSCIENCE
DOI: 10.1523/JNEUROSCI.1404-08.2008
Keywords
visual cortex; color vision; spatial vision; single-opponent; double-opponent; contrast
Categories
Funding
- NEI NIH HHS [P30 EY013079-09, EY-01472, P30 EY013079, EY-P031-13079, R01 EY008300-17, R01 EY001472-32, EY-8300, R01 EY001472, R01 EY008300] Funding Source: Medline
- NIMH NIH HHS [MH-12430-01, F31 MH012430-01, F31 MH012430] Funding Source: Medline
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Form has a strong influence on color perception. We investigated the neural basis of the form - color link in macaque primary visual cortex ( V1) by studying orientation selectivity of single V1 cells for pure color patterns. Neurons that responded to color were classified, based on cone inputs and spatial selectivity, into chromatically single- opponent and double- opponent groups. Single- opponent cells responded well to color but weakly to luminance contrast; they were not orientation selective for color patterns. Most double- opponent cells were orientation selective to pure color stimuli as well as to achromatic patterns. We also found non- opponent cells that responded weakly or not at all to pure color; most were orientation selective for luminance patterns. Double- opponent and non- opponent cells' orientation selectivities were not contrast invariant; selectivity usually increased with contrast. Double- opponent cells were approximately equally orientation selective for luminance and equiluminant color stimuli when stimuli were matched in average cone contrast. V1 double- opponent cells could be the neural basis of the influence of form on color perception. The combined activities of single- and double- opponent cells in V1 are needed for the full repertoire of color perception.
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