fMRI and Human Stereopsis

Research Overview

Starting in 1996, I began a project with David Heeger to use functional magnetic resonance imaging (fMRI) to study the neural basis of binocular vision and depth perception in humans. This project continued over 3 years with Ben Backus, Geoff Boynton, Rehan Khan and Andrew Parker.

It is well known that disparity tuned neurons are widespread in several visual cortical areas, but it is not clear which of these neurons are involved in stereo depth perception per se. Specific populations of neurons may be involved in binocular fusion, controlling vergence eye movements, or non-stereopsis related tasks. Using different 3d surface configurations in our stimulis, and varying amounts of binocularly uncorrelated noise, we are identifying brain areas where the fMRI signals are good correlates of visual perception.

Publications / Conference Presentations

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