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Updated: May 29, 2026

Co-analysis of Brain Structure and Function using fMRI and Diffusion-weighted Imaging
Published on: November 8, 2012
Attentional modulation of fMRI responses in human V1 is consistent with distinct spatial maps for chromatically
Joo-Hyun Song1, Jess Rowland, Robert M McPeek
1Department of Cognitive, Linguistic & Psychological Sciences, Brown University, Providence, Rhode Island 02912, USA. joo-hyun_song@brown.edu
Abstract:
Attending to different stimulus features such as contrast or orientation can change the pattern of neural responses in human V1 measured with fMRI. We show that these pattern changes are much more distinct for colored stimuli than for achromatic stimuli. This is evidence for a classic model of V1 functional architecture in which chromatic contrast and orientation are coded in spatially distinct neural domains, while achromatic contrast and orientation are not.
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