[Mechanisms of interaction between the parietal association and projection areas of the cat neocortex]

Abstract

The pecularities of evoked potentials changes in the first visual, first somatic and parietal cortical areas locally cooled under nembutal anesthesia, as well as in the association thalamic nuclei (pulvinar and posterolateral) were studied in cats. Two types of interaction between these cortical structures were distinguished. Type I interaction was observed between all the studied cortical areas; type II--took place only between the parietal and each of the projection areas. Type I is suggested to be formed by cortical connections, type II--by direct and indirect subcortical ones. The peculiarities of involving the association parietal area into type I and II interactions according to its activation by different modality signals are discussed.