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- W2119704728 abstract "In area V1 of cat and monkey, there is a surround region beyond the classical receptive field (CRF) which alone is unresponsive but may modulate the cell's response. This field is referred to as the nonclassical receptive field (nCRF). It has been reported in monkey that the extent of CRF and/or nCRF of V1 neurons is not fixed but varies with stimulus contrast. We reexamined the contrast dependence of V1 neurons in cat to determine whether this differs from previous studies in macaque. By fitting the spatial summation curves obtained at different contrasts with a difference of Gaussians model, we estimated quantitatively the effect of contrast on the spatial extent of the CRF and nCRF as well as the strength of surround suppression. Our results showed that both the CRF and nCRF expanded at low contrast, but the expansion is more marked for the CRF than for the nCRF. Although the effect of contrast on surround suppression was varied, the overall suppression increased significantly at high contrast. Moreover, the contrast-dependent change in the extent of CRF is independent of the change in suppression strength. Overall, our results in cat are in agreement with those obtained in macaque money." @default.
- W2119704728 created "2016-06-24" @default.
- W2119704728 creator A5053696675 @default.
- W2119704728 creator A5087435357 @default.
- W2119704728 creator A5089632865 @default.
- W2119704728 date "2012-02-02" @default.
- W2119704728 modified "2023-09-23" @default.
- W2119704728 title "Contrast-Dependent Variations in the Excitatory Classical Receptive Field and Suppressive Nonclassical Receptive Field of Cat Primary Visual Cortex" @default.
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- W2119704728 doi "https://doi.org/10.1093/cercor/bhs012" @default.
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