[The adaptive regulation of the nonlinear dynamics of brain electrical activity].
The reinforcing automated stimulation of the emotional positive hypothalamic areas which was contingent upon the multiperiodical events in the EEG structure increased the number of episodes with non-linear dynamics. It resulted in an increase in the frequency of the intracranial self-stimulation. Under conditions of controlled experiment a possibility was shown of the intentional experimental formation of the EEG episodes with different types of non-linear dynamics. At the stages preceding the associative learning, the application of fractal analysis enabled 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 which 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 stimulation.
Mogilevskiĭ
A Ia
AIa
Derzhiruk
L P
LP
Panchekha
A P
AP
Derzhiruk
E A
EA
D000222:Adaptation, Physiological; D000818:Animals; D001921:Brain / Q000502:physiology*; D004558:Electric Stimulation; D004569:Electroencephalography; D004594:Electrophysiology; D017709:Fractals; D007031:Hypothalamus / Q000502:physiology; D017711:Nonlinear Dynamics; D051381:Rats; D012054:Reinforcement, Psychology; D012653:Self Stimulation / Q000502:physiology