[Changes in the reactivity of the visual cortex neurons as affected by the posterolateral hypothalamus and the raphe nuclei of the midbrain].

Different types of the visual cortex neuronal responses to the 15-30 min rhythmic photostimulation under the effect of electrical stimulation of "positive" emotional hypothalamic area and that of midbrain raphe nuclei were revealed in rabbits: the synergic character of the effect of "positive" hypothalamic emotional area, midbrain raphe nuclei to reactive properties of the visual cortex neurons. The same regularity was observed in interrelation analysis of the cortical neurons recorded in the same cortex microvolume as revealed by cross-interval histogram technique. The data obtained suggest a dual role of serotoninergic mechanisms (mediator and modulator) in actualization of hypothalamic effect on the cortex processes.