Российская академия наук

Latitudinal differences of the cerebral bioelectric activity changes during HRV biofeedback in northerners adolescents

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Latitudinal differences of the cerebral bioelectric activity changes during HRV biofeedback in northerners adolescents

Demin D.B. 1,2, Poskotinova L.V. 1,2, Krivonogova E.V. 1,2

The Institute of Environmental Physiology, Russian Acad. Sci., Ural Branch, Institute of Medical-Biological Research NArFU named after M.V. Lomonosov, Arkhangelsk, Russia, denisdemin@mail.ru
There were determined the features of the brain functional activity and the nature of its changes during the single session of heart rate variability biofeedback in 250 adolescents aged 15-17 years living in the Subpolar region (64°30' n.l.) and Polar region (67°30' n.l.) of the European North.

There were revealed “northern” age-specific of the brain bioelectric reactivity to sensory signals in adolescents. There were a higher background activity diencephalic subcortical brain structures in adolescents Polar region, “maturation” of the electroencephalogram (EEG) structure accompanied their preservation elevated theta-activity, the presence of diffuse uptake fotic driving reactions and paroxysmal activity. An amplitude-frequency pattern of EEG was more appropriate age in adolescents of Subpolar region than in adolescents of Polar region. It was found that the ability of the subject to self-regulation in order to enhance vagal effects on heart rate also determines the extent of its impact on the functions and structures of the central autonomic regulation. Regardless of the region of residence success in such cardio-training forms different options for changing adolescent brain activity, which are due to both individual choice of cognitive strategies, and perhaps autonomic nervous tone. There may be a general strengthening of the alpha-activity spectral power, indicating an increase in the internal synchronization pacemaker brain structures and the reduction itself, reflects the process of strengthening desynchronizing influences of the reticular formation of the cerebral cortex. Strengthening of alpha-activity in adolescents of Polar region more stable over time and against the background of a marked reduction in theta-activity in the occipital and frontal regions of the brain in comparison with adolescents of Subpolar region. Regardless of the alpha-activity changes during biofeedback training and region of residence, the persons surveyed experienced higher resistance subcortical regulation to sensory signals. In adolescents of Polar region was also reduced the incidence of paroxysmal activity. The processes of restructuring EEG patterns during cardio-training are most clearly seen in the right hemisphere, often with the involvement of prefrontal areas.

This research work was supported by a grant of the Ural Branch, Russian Academy of Sciences № 12-U-4-1019.

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