[Monomodal convergence in the visual system of the alert cat].

In chronic experiments on waking cats, the interaction between signals evoked by simultaneous stimulation of the lateral geniculate body (LGB) and pulvinar was mainly of occlusive type which was more pronounced in the visual than in the associative cortical area. Conditioning stimulation of LGB depressed the response to testing stimulation of the pulvinar at delays of 10 ms. Delays of 20-60 ms facilitated the response. At short delays between the stimuli, the conditioning pulvinar stimulation either did not change significantly the response to testing LGB stimulation or facilitated it. At long (80-200 ms) delays the same conditioning stimulation produced a depression of the response to the testing stimulation. The results obtained point to monomodal convergence in the system of the cat visual analyzer and also to a relative autonomy and predominance of the cortical input from LGB and to dependence of pulvinar input functioning on the degree of activation of the geniculo-cortical path.