ADAPTIVE REGULATION OF NONLINEAR DYNAMICS OF BRAIN ELECTRICAL-ACTIVITY

The reinforcing automated stimulation of the emotionalpositive hypotha lamic areas which was contingent upon the multiperiodical events in th e EEG structure increased the number of episodes with non-linear dynam ics. It resulted in an increase in the frequency of the intracranial s elf-stimulation. Under conditions of controlled experiment a possibili ty was shown of the intentional experimental formaion of the EEG episo des with different types of non-linear dynamics. At the stages precedi ng the associative learning, the application of fractal analysis enabl ed revealing a complex character of non-linearity in the bands of the EEG dominant frequencies with a slight tendency to a dominant process. The associative learning produced one dominant non-linear process whi ch determined the dynamics of the whole system. The neurophysiological characteristics of the given adaptive process were determined as well as the difference between this process and the response to control st imulation.