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The Journal of Neuroscience, April 1, 2002, 22(7):2904-2915
Natural Stimulation of the Nonclassical Receptive Field Increases Information Transmission Efficiency in V1
William E. Vinje1, 2 and Jack L. Gallant1, 3 1 Neuroscience Program and Departments of 2 Molecular and Cellular Biology and 3 Psychology, University of California at Berkeley, Berkeley, California 94720-1650
We have investigated how the nonclassical receptive field (nCRF) affects information transmission by V1 neurons during simulated natural vision in awake, behaving macaques. Stimuli were centered over the classical receptive field (CRF) and stimulus size was varied from one to four times the diameter of the CRF. Stimulus movies reproduced the spatial and temporal stimulus dynamics of natural vision while maintaining constant CRF stimulation across all sizes. In individual neurons, stimulation of the nCRF significantly increases the information rate, the information per spike, and the efficiency of information transmission. Furthermore, the population averages of these quantities also increase significantly with nCRF stimulation. These data demonstrate that the nCRF increases the sparseness of the stimulus representation in V1, suggesting that the nCRF tunes V1 neurons to match the highly informative components of the natural world.
Key words: information theory; nonclassical receptive field; V1; sparse coding; efficiency; natural vision
Copyright © 2002 Society for Neuroscience 0270-6474/02/2272904-12$05.00/0
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