Visual cortex neurons in monkey and cat: contrast response nonlinearities and stimulus selectivity

Duane G. Albrecht; Wilson S. Geisler

doi:10.1117/12.171147

17 March 1994 Visual cortex neurons in monkey and cat: contrast response nonlinearities and stimulus selectivity

Duane G. Albrecht, Wilson S. Geisler

Proceedings Volume 2054, Computational Vision Based on Neurobiology; (1994) https://doi.org/10.1117/12.171147
Event: Computational Vision Based on Neurobiology, 1993, Park Grove, CA, United States

Abstract

The contrast response functions of cat and monkey visual cortex neurons reveal two important nonlinearities: expansive response exponents and contrast gain control. These two nonlinearities (when combined with a linear spatiotemporal receptive field) can have beneficial consequences on stimulus selectivity. Expansive response exponents enhance stimulus selectivity introduced by previous neural interactions, thereby relaxing the structural requirements for establishing highly selective neurons. Contrast gain control maintains stimulus selectivity, over a wide range of contrasts, in spite of the limited dynamic response range and the steep slopes of the contrast response function.

Citation Download Citation

Duane G. Albrecht and Wilson S. Geisler "Visual cortex neurons in monkey and cat: contrast response nonlinearities and stimulus selectivity", Proc. SPIE 2054, Computational Vision Based on Neurobiology, (17 March 1994); https://doi.org/10.1117/12.171147

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