[The overlapping in the striatum of the projection areas of corticofugal fibers from the somatosensory and motor regions of the rat cerebral cortex].

The Fink-Heimer techniques were used to determine the neostriatal projections from cortical M1 and S1 physiologically identified representations of the forepaw. While corticostriatal fibres from S1 enter dorso-lateral parts of the neostriatum fibres from M1 penetrate the dorsal part of the neostriatum more rostrally. Both fibre groups pass in rostrocaudal direction to the globus pallidum, forming terminals on their way. Most of the fibre terminals of M1 projection are located laterally overlapping the zone of distribution of S1 fibre terminals in the neostriatum. Overlapping terminals of the corticofugal fibres of S1 and M1 in the lateral neostriatum can form a basis for interaction of somatosensory and motor impulses. It may be suggested that the role of the neostriatum in sensory integration is associated with certain features of the corticofugal fibre terminals distribution in it at all levels of development of the central nervous system.