![]() Many different functions have been ascribed to long-range intrinsic connections. There is extensive cross-talk between different orientation domains and clear differences in the layout of long-range excitatory and inhibitory connections. Both the selectivity and maximal lateral extent of long-range connections depend on the layer. ![]() The selectivity of the long-range connections may depend on the relative position of a neuron within a functional map such as projections extending from pinwheel centers are less orientation selective than projections originating from linear zones of an orientation preference map. The majority of long-range intrinsic connections of excitatory cortical neurons in the primary visual cortex of cats link neurons with similar response properties such as orientation preference and possibly also direction preference. ![]() ![]() This chapter focuses on the detailed layout of long-range horizontal connections in the primary visual cortex of cats, their topographic relation to functional cortical maps, learning and activity-induced modifiability, and possible functions.
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