[Extracallosal channels of interhemispheric transmission of visual information]

Evoked potentials (EP) in response to light flashes were recorded in cats with different degree of optical tract disconnection. In intact and operated on animals, the latent period of the first component of these EP was the same as in the visual cortex. The different degree of disconnection of the classic and commissural optical tract brought about an increase in the amplitude of commissural potentials. The data obtained point to the existence of the effective callosal and extracallosal volleys of interhemispheric transmission of visual information, which are also likely to pay an essential part in compensatory processes of the optical system.