[Electrophysiologic study of thalamo-cortical connections during early postnatal ontogeny in cats]

Abstract

Evoke potentials (EP) in the sensomotor, parietal, temporal and occipital areas of the cortex induced by the stimulation of thalamic nuclei (LP, VL, CL) were widely spread over the brain in kittens (6 to 41--day old) under nembutal anesthesia. Decreases of the EP latency and duration occurred mainly in those cortical structures into which direct protections of the thalamic were formed during ontogenesis. No significant changes in the EP characteristics occurred in other cortical zones. Dynamics of the EP characteristics in the cortex elicited by stimulating of the thalamic nuclei seems to reflect functional maturation of thalamocortical connections during early postnatal ontogenesis.