[Neuronal mechanisms of sensory integration in the visual analyzer system]

It has been established in experiments on immobilized cats that somatic and interoceptive signals produce complex reorganizations of the spontaneous and evoked activity of visual cortex units. Either long diffuse changes of spike frequency or phasic reactions have been observed. The dynamics of sensory integration in the visual cortex is determined by unconditioned and conditioned mechanisms both of an intra- and interanalyser nature. Functioning of the microsystem of learning elements in the visual cortex is based on units capable of fixing the elaborated changes of evoked activity and constituting 18.6 percent of the total number of cellular elements in the visual projection cortex, responding to direct cortical stimulation. Microinophoresis of synaptically active agents has shown that complexely organized choline- and serotoninergic structures involved in the processes of unconditioned and conditioned interaction of heteromodal excitations are located in the visual cortex.