[Interaction of recovery cycles of evoked potentials in the cerebral cortex of the cat in response to stimulation of the superior colliculi and pulvinar]

Abstract

Similar character of recovery cycles of evoked potentials in the visual cortex to electric stimulation of the superior colliculi (SC) and pulvinar was found in chronic experiments on alert cats irrespective of stimuli presentation order. In the association cortex preceding SC stimulation facilitated the response to test stimulation of pulvinar almost at all delays between the stimuli. If the pulvinar stimulation was applied as a conditioned stimulus, then the response to SC stimulation under intervals of 20-200 ms was depressed. The obtained data point to equivalence of the inputs from SC and pulvinar to the visual cortex, to different informational value of inputs from SC to the association and visual cortex, and to mutual function dependence of the inputs from SC and pulvinar to the association cortex.