[Interhemispheric transmission of visual information to the cat somatosensory cortex: role of subcortical commissures].

Experiments were made on adult cats with combined transection of the visual tract and brain commissures. One to 1.5 month after operation microelectrodes were implanted into the primary somatosensory cortex. Transection of the classical and commissural (with the exception of subventricular and mesencephalon reticular interhemispheric tracts) visual inputs to the somatosensory cortex resulted in a decrease of the number of neurons that responded to visual stimulation. Activation of such neurons was provoked by visual information conduction via two subcortical commissural communications: the third ventricular fundus and midbrain reticular formation.