论文信息 - Statistics of LGN activity determine the segregation of ON / OFF subfields for simple cells in cortex

Statistics of LGN activity determine the segregation of ON / OFF subfields for simple cells in cortex

Visual cortical simple cells show a strong preference for edges of a particular orientation[Hubel and Wiesel, 1962]. The receptive field of the cortical cell shows adjacent excitatory and inhibitory subfields, which are projections from ON-center and OFF-center LGN cells, respectively[Reid and Alonso, 1995]. Here we present a single cell model using ON and OFF channels, a natural scene environment, and the BCM[Bienenstock et al., 1982] learning rule. The results from the model imply that the input distribution from LGN to cortex should be almost symmetrical in order to develop the proper segregation of ON/OFF subfields; There is a relation between the organization of simple cell receptive fields and the shape of the input distribution.

Ann B. Lee | L. Cooper | H. Shouval | B. Blais

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