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Normalization of cell responses in cat striate cortex

Published online by Cambridge University Press:  02 June 2009

David J. Heeger
David J. Heeger
Affiliation:
NASA-Ames Research Center, Moffett Field, California and Department of Psychology, Stanford University, Stanford, California
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Abstract

Simple cells in the striate cortex have been depicted as half-wave-rectified linear operators. Complex cells have been depicted as energy mechanisms, constructed from the squared sum of the outputs of quadrature pairs of linear operators. However, the linear/energy model falls short of a complete explanation of striate cell responses. In this paper, a modified version of the linear/energy model is presented in which striate cells mutually inhibit one another, effectively normalizing their responses with respect to stimulus contrast. This paper reviews experimental measurements of striate cell responses, and shows that the new model explains a significantly larger body of physiological data.

Keywords

Striate (primary visual) cortexSimple cellsComplex cellsLinear operatorsEnergy mechanismsNormalizationDivisive suppressionGain controlResponse saturationAdaptationNonspecific suppression

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Type
Research Articles
Information
Visual Neuroscience , Volume 9 , Issue 2 , August 1992 , pp. 181 - 197
Copyright
Copyright © Cambridge University Press 1992

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