Normalization of cell responses in cat striate cortex

Visual Neuroscience - Tập 9 Số 2 - Trang 181-197 - 1992
David J. Heeger1
1NASA-Ames Research Center, Moffett Field, California and Department of Psychology, Stanford University, Stanford, California

Tóm tắt

AbstractSimple 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.

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