Abstract: This study examines the dynamics of heart rate variability indices under the influence of a stress stimulus. The most recognized methodological basis for studying and quantifying the system of neurohumoral regulation is the mathematical analysis of heart rate variability (HRV). The first part of the study is based on an analysis of the autonomic nervous system. In the second part, the study presents the cross-analysis of HRV and the variability of the duration of the respiratory cycle. The third part of this study is devoted to the features of the dynamics of indices of autonomous regulation under the influence of mental and physical stress stimuli. The study was conducted during the special training of candidates for cosmonauts. First group - candidates for cosmonauts during maritime training for survival. Second group - instructors and candidates for cosmonauts during special parachute training. The results of the study showed the difference between physical and emotional stress. With physical exertion, the activation of the sympathoadrenal system is accompanied primarily by the release of adrenaline, and when the psychoemotional effect is activated, the activation of the sympathoadrenal system is ensured by the release of norepinephrine, the neurogenic canal.
Key words: stress stimulus, distress, adaptation, neurohumoral regulation, HRV parameters, pathogenetic basis of the development of the disadaptation reaction
Introduction. Stress is the multi-level systemic response of an organism to any exposure that exceeds the capabilities of its selective homeostatic response mechanisms (T.A. Day, 2005). Therefore, quantitative measurement of the human body’s physiological response to stress should be based on a multilevel approach and it involves assessment of the following...
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Михайлов Владимир Моисеевич
специалист высшей категории, врач функциональной диагностики