Contrast Gain Control is Drift-Rate Dependent: An Informational Analysis
Neurons in the visual cortex code relative changes in illumination (contrast) and adapt their sensitivities to the visual scene by centering the steepest regions of their sigmoidal contrast response functions (CRFs: spike rate as a function of contrast) on the prevailing contrast. The influence of this contrast gain control has not been reported at nonoptimal drift rates. We calculated the Fisher information contained in the CRFs of halothane- anesthetized cats. Fisher information gives a...[Show more]
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|Source:||Journal of Neurophysiology|
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