Temporal dynamics of binocular disparity processing with corticogeniculate interactions

Authors:
Stephen Grossberg;Alexander Grunewald
Affiliations:
Department of Cognitive and Neural Systems, Center for Adaptive Systems, Boston University, 677 Beacon Street, Boston, MA;Departments of Psychology and Physiology, University of Wisconsin--Madison, 1202 West Johnson Street, Madison, WI
Venue:
Neural Networks
Year:
2002

Citing 4
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Cortical dynamics of three-dimensional surface perception: binocular and half-occluded scenic images

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Self-Organization of Binocular Disparity Tuning by Reciprocal Corticogeniculate Interactions

Journal of Cognitive Neuroscience

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Abstract

A neural model is developed to probe how corticogeniculate feedback may contribute to the dynamics of binocular vision. Feedforward and feedback interactions among retinal, lateral geniculate, and cortical simple and complex cells are used to simulate psychophysical and neurobiological data concerning the dynamics of binocular disparity processing, including correct registration of disparity in response to dynamically changing stimuli, binocular summation of weak stimuli, and fusion of anticorrelated stimuli when they are delayed, but not when they are simultaneous. The model exploits dynamic rebounds between opponent ON and OFF cells that are due to imbalances in habituative transmitter gates. It shows how corticogeniculate feedback can carry out a top-down matching process that inhibits incorrect disparity responses and reduces persistence of previously correct responses to dynamically changing displays.