Response of Visual Area to Callosal Impulses in the Cat. ∗

Abstract

Conclusions

This being so, the formal analogy between the sensory and the callosal response of the visual area seems to indicate that the system of retino-geniculo-cortical fibers (and neurones) which is responsible for the characteristic pattern of the sensory response is prolonged beyond the primary visual cortex in the commissural fiber-tract connecting the left and right homologous areas. As a physiological interhemispheric transfer between homologous receiving areas (visual, auditory and somatosensory) has been demonstrated by psycho-physiological (13) and electro-physiological (14) experiments, the raison d'etre of the callosal prolongation of this system seems to be looked for in the necessity of conserving the spatiotemporal pattern, and correlatively the information, of the sensory message during its interhemispheric transfer.