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.

A.A. Martynova et al. Under values of these indices above 50% (fixed point of normal state) - the psycho physiological state and the level of adaptation are considered as a high, and under values lower than 50% - one is low. Results: Evaluation of the personal values of the adaptation level in children group showed that the adaptation reserves of the children examinees varied from 49.6% to 74.6%. That is mean a different adaptive potential in children group (Table 1). We found, that adaptive possibilities of some children were too a low. The same pattern in indicators of functional state can be seen on the examples of the autonomic and central regulation, psycho-emotional state, as well as a combined indicator of psychophysiological state. Values of the psycho physiological indicators in group of examinees are evidence of a relatively low adaptive capacity of the Northern children. The low adaptive potential and the high level of tension of the regulatory systems in the body of the Northern children are confirmed by the average values ID =171.35 ± 26.05 and IRPA index =51.15 ± 4.74, relative units (relatively normal range 35-145 and 15-50, respectively). In some case the personal index of vegetative balance (IVB) was equal 391.4, relative units (35-145) that indicates premorbidity state. Table 1. Psychophysiological characteristics and indicators (relative units) of the adaptation features of the Northern children to the middle latitudes The average values for the sample M ±m Min. Max. Std. dev. Norm. A - level of adaptation 62.7±2.3 49.58 74.65 7.21 60-100 В - an indicator of autonomic regulation 67.8±3.5 50.35 88.11 11.16 60-100 С - an indicator of central control 61.04±2.5 46.03 68.03 8.00 60-100 D - psycho-emotional state 63.1±2.1 50.35 70.22 6.73 60-100 integral indicator of the state of 63.4±2.7 46.30 74.63 8.53 60-100 IVB - Index vegetative balance 171.4±26.1 94.46 391.37 82.37 35-145 IVR - vegetative rhythm 0.36±0.01 0.32 0.392 0.02 0.25-0.6 IRPA - a measure of the adequacy of regulatory processes 51.2±4.7 34.11 88.20 14.99 15-50 ID - index of tension of regulatory systems 137.1±29.8 60.84 394.43 94.35 10-100 To analyze the dynamics of adaptation of the Northern children to the conditions in the mid-latitude the daily monitoring of psycho-physiological state of examinees was conducted. For this analysis, the all examinees were divided on two groups, depending on the amplitude of the oscillations of the index of the tension of regulatory systems (ID): in the first group the ID fluctuations have a slow amplitude, in the second group - a higher (Fig. 1) Distribution of the mean Ш of in the first group shows regulation of the heart rhythm by the moderate prevalence of the sympathetic tone, associated with a particular strain of the adaptation mechanisms and with adequate response of the autonomic nervous system to the conditions in the middle latitude (Fig. 1, bottom curve, 1). The high variability of the values of ID in the second group (Fig. 1, upper curve, 2) shows the presence of the opposing influences of the autonomous and central regulation of the heart rhythm as well as the humoral-metabolic effects. In general, the index ID in the first group of the examinees is significantly higher than in the normal range, and, on certain days it significantly increased (7 and 11 August). This means that the complete adaptation to the conditions of middle latitude in this group of children does not occur, on the contrary, the index ID increases toward the end of the stay on vacation. In the second group the index ID, practically does not change during the holyday period, and it remains in the normal range. Fig. 1. Dynamics of stress index (Ю) in the two groups of subjects. On the horizontal axis - the days of the study, the relevant dates of the registration parameters (from 4 to 13 August 2011), the vertical axis - the value ID, arbitrary units. 177