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Cerebral Cortex, Vol. 9, No. 3, 257-263, April 1999
© 1999 Oxford University Press

An fMRI Version of the Farnsworth–Munsell 100-Hue Test Reveals Multiple Color-selective Areas in Human Ventral Occipitotemporal Cortex

Michael S. Beauchamp, James V. Haxby, Jonathan E. Jennings1 and Edgar A. DeYoe1

Section on Functional Brain Imaging, Laboratory of Brain and Cognition, National Institute of Mental Health, Bethesda, MD 20892 and , 1 Department of Cellular Biology and Anatomy, Medical College of Wisconsin, Milwaukee, WI 53226, USA

Studies of patients with cerebral achromatopsia have suggested that ventral occipitotemporal cortex is important for color perception. We created a functional magnetic resonance imaging (fMRI) version of a clinical test commonly used to assess achromatopsia, the Farnsworth–Munsell 100-Hue test. The test required normal subjects to use color information in the visual stimulus to perform a color sequencing task. A modification of the test requiring ordering by luminance was used as a control task. Subjects were also imaged as they passively viewed colored stimuli. A limited number of areas responded more to chromatic than achromatic stimulation, including primary visual cortex. Most color-selective activity was concentrated in ventral occipitotemporal cortex. Several areas in ventral cortex were identified. The most posterior, located in posterior fusiform gyrus, corresponded to the area activated by passive viewing of colored stimuli. More anterior and medial color-selective areas were located in the collateral sulcus and fusiform gyrus. These more anterior areas were not identified in previous imaging studies which used passive viewing of colored stimuli, and were most active in our study when visual color information was behaviorally relevant, suggesting that attention influences activity in color-selective areas. The fMRI version of the Farnsworth–Munsell test may be useful in the study of achromatopsia.


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