Variants of EEG-reactions during HRV biofeedback course in adolescents with different initial autonomic nervous tone

Abstract

There was surveyed a character of brain bioelectric activity change during carrying out of biofeedback sessions by heart rate variability parameters (HRV biofeedback) in adolescents aged 15-17 years with different initial autonomic nervous tone. It has been established, that adolescents with the optimal autonomic nervous tone have high reactance of both autonomic nervous system parts. At the end of HRV biofeedback course there is more significant vagal activity increase accompanied in some cases by depression of peakfrequency electroencephalogram characteristics. There was observed in adolescents with prevalence of sympathetic influences on heart rate activity against decreasing of arterial blood pressure less expressed reaction of heart rate indicators and brain functional activity optimization after the course of HRV biofeedback sessions.