Abstract

Ipsilateral associative connections between different fields in the primary sensory (S1) and primary motor (M1) areas of the cortex were studied in 25 adult cats after local coagulation and infusion of horseradish peroxidase. The distributions of associative M1 and S1 fibers were found to correspond to the margins of the somatotopic representations of different parts of the body. The fields within M1 (4y, 6ab) and S1 (1, 2, 3a, 3b), which have different morphofunctional organization, were not connected by a system of associative fibers crossing the cytoarchitonic boundaries of these fields. The primary sensory (S1) and motor (M1) areas of cortex did not have reciprocal connections. Occasional fibers connected neighboring fields in M1 and A1.

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