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Computation of motion direction by quail retinal ganglion cells that have a nonconcentric receptive field

Published online by Cambridge University Press:  01 March 2000

HIROYUKI UCHIYAMA ,
TAKAHIDE KANAYA  and
SHOICHI SONOHATA
HIROYUKI UCHIYAMA
Affiliation:
Department of Information and Computer Science, Faculty of Engineering, Kagoshima University, Kagoshima 890-0065, Japan Intelligence and Synthesis, PRESTO, Japan Science and Technology Corporation, Tokyo 105-0013, Japan
TAKAHIDE KANAYA
Affiliation:
Department of Information and Computer Science, Faculty of Engineering, Kagoshima University, Kagoshima 890-0065, Japan
SHOICHI SONOHATA
Affiliation:
Department of Information and Computer Science, Faculty of Engineering, Kagoshima University, Kagoshima 890-0065, Japan
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Abstract

One type of retinal ganglion cells prefers object motion in a particular direction. Neuronal mechanisms for the computation of motion direction are still unknown. We quantitatively mapped excitatory and inhibitory regions of receptive fields for directionally selective retinal ganglion cells in the Japanese quail, and found that the inhibitory regions are displaced about 1–3 deg toward the side where the null sweep starts, relative to the excitatory regions. Directional selectivity thus results from delayed transient suppression exerted by the nonconcentrically arranged inhibitory regions, and not by local directional inhibition as hypothesized by Barlow and Levick (1965).

Keywords

Retinal ganglion cellsDirectional selectivityMotion perceptionQuail
Type
Research Article
Information
Visual Neuroscience , Volume 17 , Issue 2 , March 2000 , pp. 263 - 271
Copyright
2000 Cambridge University Press

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