Physics of auroral phenomena : proceedings of the 35th Annual seminar, Apatity, 28 Februaru – 02 March, 2012 / [ed. board: A. G. Yahnin, A. A. Mochalov]. - Апатиты : Издательство Кольского научного центра РАН, 2012. - 187 с. : ил., табл.

THE GEOMAGNETIC VARIATIONS DEPENDENCE OF ADAPTATION OF THE NORTHERN CHILDREN TO THE MIDDLE-LATITUDE A.A. Martynova, S.V. Pryanichnikov, T.B. Novikova, N.K. Belisheva Scientific Department o fMedical and Biological Problems o f human adaptation in.the Arctic, KSC RAS, Apatity One of the natural factors of risk to human health is the geomagnetic disturbances that violates the temporal sequence of information signals synchronizing biological rhythms with environment (Presman AS, 1968; Dubrov, 1974; Moiseeva, Lyubitski, 1986). Physiological effects of the geomagnetic field (GMF) variations were demonstrated on the diverse systems of the human body (Belisheva et al., 1994; Belisheva, Merkushev, 1999; Belisheva, Konradov, 2005; Belisheva et al., 2007). It is believed that the geomagnetic disturbances are not the cause of the specific diseases, but they aggravate the existing functional impairment on reason of the imbalance of the regulative systems in the body (Kaznacheev, 1980; Soroko, 1985; Shepovalnikov, Soroko, 1992). According to the hypothesis about the physiological mechanisms of the influence of the geomagnetic field (GMF), the increase of the geomagnetic activity (GMA) acts on the central nervous system (CNS). By the result of such impact on the CNS, the compensatory physiological processes are transforming and the sensitivity to the perception of unwanted external agents is reduced (Presman AS, 1968; Soroko, 1985; Moiseeva, Lyubitski, 1986). The analysis of the qualitative and quantitative characteristics of geomagnetic variations, their "dose" dependence of the brain functional state showed that the stable state of the human brain is determinated by the periodic oscillations of the GMF field in a certain amplitude-frequency range. Break of a structure of the GMF variations can be responsible for unstable state of the brain and the corresponding psycho-emotional reactions (Belisheva et al., 1995). It was shown that parameters of interplanetary media associated with the low level of the GMA were closely related with the indices of the unstable emotional state: anxiety, depression, hysteria, psychosis and etc. (Belisheva, Kachanova, 2002). The physiological processes could be activated or inhibited according to amplitude-frequency range of the GMF variations, and, in the case of the essential disturbance of the functional state of human body, the GMF activity may provoke desynchronosis and consequently failure of adaptation. Thus, in result of the variations of the GMF tension, the temporal sequence of the environmental information signals can be broken and lead to the functional state of human body which is characterized by a mismatch between the functional abilities and requirements to functional activity that predisposes to the appearance of the pathological states (Soroko, 1985; Moiseeva, Lyubitski, 1986; Tkachev et al, 1992). The purpose of the study was to assess the features of the Northern children adaptation to the middle latitudes under variations of GMF. Materials and Methods: The study of the Northern children adaptation to the middle latitudes was carried out on the basis of the Wellness Centre "Ekovit" of the Kola Science Centre RAS (Aleksandrovka-Don Pawlowski Voronezh region). Adaptational abilities were assessed by using of the device "Omega M", based on the analysis of biological rhythms of the human body, obtained by measurement of electro cardio signal in a wide range of frequencies. The method is based on a new informational technology of the analysis of bio- rhythmical processes by using "fractal neurodynamics." System analysis included four modes: analysis o f heart rhythm variability - the performance appraisal of autonomic regulation by the statistical methods, temporal and spectral analysis of heart rhythm variability; Neurodynamic analysis - assessment of central regulation of the endocrine system and the methods of neurodynamic analysis of biological rhythms; mapping of the brain biorhythms - psycho physiological assessment of the examinees by methods of phase analysis and mapping of biological rhythms of the brain; fractal analysis - assessment of the degree of the harmonization of biorhythms of the body and determine the immune status by the information about of the fractal analysis. The indicators of psycho physiological state included: IVB (Index of the vegetative balance) - indicates the ratio between the activity of the sympathetic and parasympathetic nervous systems (IVB = Amo (mode amplitude) / Дх); ERPA (index of the adequacy of regulatory processes) - which shows the correlation between the activity of the parasympathetic system and leading-functioning sinus node (IRPA = AMo / Mo); IVR (vegetative rhythm) - indicates the vegetative balance in terms of the activity of the independent regulative contour (IVR = 1/Mo * Ax): under higher activity, ie IVR, under smaller value of the, the vegetative balance shifts towards predominance of the parasympathetic autonomic nervous system; ID (index of the tension of regulatory systems) - shows the degree of centralization of the control over the heart rhythm (ID = AMo / 2 * Ax * Mo); We have also used the integral indicators which allow make a rapid diagnosis o f the mental and the emotional state of the human body (expressed in % relatively normal state). These indicators are referred to as: A - level of adaptation, В - an indicator of autonomic regulation, С - an indicator of central control, D - psycho-emotional state. “P h y sic s o f A uroral P h en om en a ’, Proc. XXXV A n n u al S em inar, A p a tity, p p . 1 7 6 - 1 7 8 , 2 0 1 2 © Kola Science Centre, Russian Academy of Science, 2012 Polar Geophysical Institute 176