Contrast adaptation in striate cortex of macaque |
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Authors: | G Sclar P Lennie D D DePriest |
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Institution: | Department of Psychology, University of Rochester, NY 14627. |
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Abstract: | We have characterized the contrast-response relationships for simple and complex cells in striate cortex of macaque monkey, before and during adaptation to high-contrast sinusoidal gratings of the optimal spatial-frequency and orientation. Adaptation brings about systematic changes in the steepness of contrast-response curves and in the effective contrast of stimuli. Adaptation reduces the detectability of low-contrast gratings by almost a factor of three, but by extending the operating range of most cells it appears to improve the discriminability of high-contrast stimuli that previously gave rise to responses of saturating amplitude. |
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