[Microsystemic organization of neuronal interactions in the central units of the visual analyzer]

Neuronal interaction in superior colliculi (SC) and visual cortex (VC) was studied in acute experiments on immobilized unanaesthetized cats with simultaneous recording of unit activity in both structures. Polarization of cortical neurones produced activational changes in the level of impulse activity of SC neurones. In a considerable number of neurone pairs (38.4 per cent), fluctuations of the mean frequency and moments of spike discharge generation were in marked correlation suggesting their synphasic modulations. The data obtained are discussed from the point of view of microsystemic organization of central mechanisms of the higher nervous activity.