Title: Search for color 'center(s)' in macaque visual cortex
Authors: Tootell, Roger B H * ×
Nelissen, Koen *
Vanduffel, Wim *
Orban, Guy #
Issue Date: Apr-2004
Publisher: Oxford University Press
Series Title: Cerebral Cortex vol:14 issue:4 pages:353-363
Abstract: It is often stated that color is selectively processed in cortical area V4, in both macaques and humans. However most recent data suggests that color is instead processed in region(s) antero-ventral to V4. Here we tested these two hypotheses in macaque visual cortex, where 'V4' was originally defined, and first described as color selective. Activity produced by equiluminant color-varying (versus luminance-varying) gratings was measured using double-label deoxyglucose in awake fixating macaques, in multiple areas of flattened visual cortex. Much of cortex was activated near-equally by both color- and luminance-varying stimuli. In remaining cortical regions, discrete color-biased columns were found in many cortical visual areas, whereas luminance-biased activity was found in only a few specific regions (V1 layer 4B and area MT). Consistent with a recent hypothesis, V4 was not uniquely specialized for color processing, but areas located antero-ventral to V4 (in/near TEO and anterior TE) showed more color-biased activity.
ISSN: 1047-3211
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Research Group Neurophysiology
* (joint) first author
× corresponding author
# (joint) last author

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