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- W2003309623 abstract "In the primary visual cortex (V1), a neuronal response to stimulation of the classical receptive field (CRF) is predominantly suppressed by a stimulus presented outside the CRF (extraclassical receptive field, ECRF), a phenomenon referred to as ECRF suppression. To elucidate the neuronal mechanisms and origin of ECRF suppression in V1 of anesthetized cats, we examined the temporal properties of the spatial extent and orientation specificity of ECRF suppression in V1 and the lateral geniculate nucleus (LGN), using stationary-flashed sinusoidal grating. In V1, we found three components of ECRF suppression: (1) local and fast, (2) global and fast, and (3) global and late. The local and fast component, which resulted from within 2° of the boundary of the CRF, started no more than 10 ms after the onset of the CRF response and exhibited low specificity for the orientation of the ECRF stimulus. These spatiotemporal properties corresponded to those of geniculate ECRF suppression, suggesting that the local and fast component of V1 is inherited from the LGN. In contrast, the two global components showed rather large spatial extents ∼5° from the CRF boundary and high specificity for orientation, suggesting that their possible origin is the cortex, not the LGN. Correspondingly, the local component was observed in all neurons of the thalamocortical recipient layer, while the global component was biased toward other layers. Therefore, we conclude that both subcortical and cortical mechanisms with different spatiotemporal properties are involved in ECRF suppression." @default.
- W2003309623 created "2016-06-24" @default.
- W2003309623 creator A5004645780 @default.
- W2003309623 creator A5024139867 @default.
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- W2003309623 creator A5067605630 @default.
- W2003309623 creator A5073306563 @default.
- W2003309623 creator A5083782157 @default.
- W2003309623 date "2014-08-01" @default.
- W2003309623 modified "2023-10-18" @default.
- W2003309623 title "Spatiotemporal characteristics of surround suppression in primary visual cortex and lateral geniculate nucleus of the cat" @default.
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