Max Planck Institute for Dynamics and Self-Organization -- Department for Nonlinear Dynamics and Network Dynamics Group
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BCCN/BFNT AG-Seminar

Tuesday, 29.04.2014 17 c.t.

Motion and spatial signals in macaque ganglion cells

by Prof. em. Dr. Barry Lee
from Biological Sciences, College of Optometry, State University of New York, NY

Contact person: Fred Wolf

Location

Ludwig Prandtl lecture hall

Abstract

Human perception appears to rest on an achromatic, luminance channel and red-green and blue-yellow chromatic channels, which differ in their spatial and temporal characteristics. It is a matter of debate how closely these channels correspond to magno-, parvo- and koniocellular pathways of the primate visual system. I shall describe three sets of experiments: 1) localization of moving achromatic targets in a hyperacuity context: 2) localization at isoluminance: 3) segregation of signals from physiological and psychophysical channels using a novel grating stimulus, in which achromatic and chromatic components have different spatial frequencies. Taken together, the experiments strongly support strict segregation of achromatic and chromatic information in different afferent pathways.

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