Neural modulation by binocular disparity greatest in human dorsal visual stream.

ABSTRACT: Although cortical activation to binocular disparity can be demonstrated throughout occipital and parietal cortices, the relative contributions to depth perception made by different human cortical areas have not been established. To investigate whether different regions are optimized for specific disparity ranges, we have measured the responses of occipital and parietal areas to different magnitudes of binocular disparity. Using stimuli consisting of sinusoidal depth modulations, we measured cortical activation when the stimuli were located at pedestal disparities of 0, 0.1, 0.35, and 0.7 degrees from fixation. Across all areas, occipital and parietal, there was an increase in BOLD signal with increasing pedestal disparity, compared with a plane at zero disparity. However, the greatest modu

SUBMITTER: Minini L 

PROVIDER: S-EPMC2904223 | biostudies-literature | 2010 Jul

REPOSITORIES: biostudies-literature