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Half-squaring in responses of cat striate cells

Published online by Cambridge University Press:  02 June 2009

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

Simple cells in striate cortex have been depicted as rectified linear operators, and complex cells have been depicted as energy mechanisms (constructed from the squared sums of linear operator outputs). This paper discusses two essential hypotheses of the linear/energy model: (1) that a cell's selectivity is due to an underlying (spatiotemporal and binocular) linear stage; and (2) that a cell's firing rate depends on the squared output of the underlying linear stage. This paper reviews physiological measurements of cat striate cell responses, and concludes that both of these hypotheses are supported by the data.

Keywords

Striate (primary visual) cortexSimple cellsComplex cellsSpatiotemporal linear operatorsEnergy mechanismsSquaringDirection selectivity

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Type
Research Articles
Information
Visual Neuroscience , Volume 9 , Issue 5 , November 1992 , pp. 427 - 443
Copyright
Copyright © Cambridge University Press 1992

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