[Patterns in the formation of transcallosal connections in the projection and associative areas of the cat cortex].

In acute experiments on immobilized 2-15-day old and adult cats, regularities of the ontogenetic callosal connexions maturation were studied in projection (somatosensory, auditory visual) and associative (sensorimotor, parietal) areas of the cortex by means of topographic recording of the transcallosal responses in symmetrical points of the opposite hemisphere. The data obtained suggest a heterochrony and different rate of the functional callosal connexions maturation in projection and associative areas of the cortex.