Predicting functional properties of visual cortex from an evolutionary scaling law |
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Authors: | Stevens Charles F |
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Institution: | Howard Hughes Medical Institute, Molecular Neurobiology Laboratory, The Salk Institute, La Jolla, CA 92037, USA. stevens@salk.edu |
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Abstract: | The number of neurons in the primary visual cortex (V1) is, across primate species, related to the number of neurons in the visual thalamus (the lateral geniculate nucleus LGN]) by a power law with an exponent of 3/2. This evolutionary scaling law is explained by a simple relation according to which the fineness of resolution in cortex is related to the number of neurons in the area of cortex used to process the information from a single point of light (the point-spread area). The same theory provides a link between two functional properties of the visual cortex, the areal cortical magnification factor (ACMF) and the receptive field (RF) area. |
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