[Structure of the functional transcallosal connections of the projection and association regions of the cat neocortex].

Homotopic responses of cortical projection areas were found to have smaller amplitude-temporal parameters and a greater stability as compared to the associative fields responses. These responses occur in local portions of the projection areas and the space of their recording enhances in the associative fields. Heterotopic responses in the projection fields occur in stimulation of a relatively lesser space of the symmetrical cortex, and the relative space of their recording is also smaller as compared to associative areas. The revealed regularities seem to reflect augmentation of interhemisphere interaction and complication of the structure of transcallosal connections of cortical associative areas. The structure of functional transcallosal connections of the projection areas seem to correspond to the principle of homotopy while the role of heterotopic transcallosal interactions enhances in the associative areas of the cortex.