Electrophysiological manifestations of the monoaminergic systems' effects on the cerebral cortex.

Consideration is given to a possible mechanism of reinforcement during training mediated through the monoaminergic systems in the brain that modulate the effectiveness of intracortical synapses. Various forms of electroencephalographic manifestations of the effect of these systems on the cerebral cortex are discussed. A comparison of the theoretical and experimental results favors the modulating role of the serotoninergic and noradrenergic systems.