В связи с увеличением возраста для выхода на пенсию в Российской Федерации (РФ), в том числе и для жителей Севера РФ (у нас речь идет о Ханты-Мансийском автономном округе (ХМАО) -Югре), возникают проблемы изучения возрастных изменений параметров нервно-мышечной [1, 2, 11], кардиореспираторной [3,7, 10, 17] систем, и в частности сердечно-сосудистой системы (ССС) для приезжих жителей ХМАО [12,13, 15]. Как себя ведут параметры ССС женщин и мужчин в возрасте 55-60 лет УДК 612.171.1 (571.122

A person's living in different environmental conditions also determines his special mental properties, such as memory, thinking, and attention. The aim of this work is to study the quality of students' attention aged 12-17 years living in different climatic and geographical regions: the city of Surgut of the Khanty-Mansi Autonomous Area and in the rural areas of central Russia (Samara region). Pupils of the first group live in extreme climatic conditions of the North, which are made worse by adverse social and environmental factors of urbanization. Pupils of the second group live in a climatically and environmentally friendly area with minimal impact of man-made pollution. The method of the Bourdon correction test was used in a modification proposed by P. A. Rudik. Result. A comparative statistical analysis of the results obtained in the evaluation of the attention properties of different age groups of students was carried out. The dynamics of changes in the K, E, A indices were studied, and the coefficients as a whole were calculated for the entire test and for each minute of the experiment. Specific features of the student's attention development were defined. Age and gender differences, differences in the development of attention indicators in students from two different schools were revealed. Conclusions: statistically significant differences (p < 0.001) of attention distribution and productivity were revealed: the attention efficiency coefficient of Surgut students is 1.15 times lower than that of their peers from the Samara region. All this demonstrates the differences in the attention parameters of students in different ecological zones.

The founder of the homeostasis theory W. B. Cannon spoke about the lack of stability of homeostasis and systems of homeostatic regulation. However, to date, the postulate of the statistical stability of samples of homeostasis parameters in various functional systems has been working in human ecology. The aim of the study is to verify this fundamental postulate and to prove the lack of statistical stability of samples of the neuromuscular and cardiovascular systems. Methods: age-related dynamics of cardio intervals was studied in three groups (38 people in each group) of Khanty women and three groups of newcomers (228 people in total), tremor and tapping parameters were studied in two groups: women (18 people) and men (16 people). The Elox-01 device was used to record cardio intervals, and the patented tremograph was used to record tremorograms. Results: the absence of statistical stability of tremorograms was proved (the number of samples of k pairs that have one sampled population not more than k1 < 5 % for tremor and k2 < 12 % for tapping), for cardio intervals k3 < 17 %. The samples are not homogeneous, the probability of their statistical repeating in a row is p < 0.05 (for one subject in constant homeostasis). It is proposed to calculate the parameters of quasi attractors that really demonstrate statistical stability (in constant homeostasis). Conclusion: the samples of the parameters of neuromuscular and cardiovascular systems are not statistically homogeneous (they change chaotically). In this regard, to assess the norm (standard) of homeostasis, it is advisable to use the calculation of the parameters of quasi attractors along the first coordinate x1 (for example, the parameters of cardio intervals or tremorograms) and x2 (rate of change x1).

Athletics in the North of the Russian Federation has significant features that are to be studied within the framework of human ecology. In this case, of particular importance are studies that are associated with controlled physical activity. The aim was to study the state of the parasympathetic and sympathetic autonomic nervous system of athletes regulating heart functioning under controlled physical activity. Methods: Data collection was performed on a group of 16 athletes according to the Helsinki Declaration. In total, 14 parameters of the cardiovascular system were recorded using the "Elox-01" and the parameters of quasi-attractors were calculated for the five-dimensional phase space. Results. Before the load (1,5 hours of playing mini-football), the indicator of parasympathetic (PAR) regulation prevailed almost 9 times (PAR = 16 c.u.) over the sympathetic (SIM) regulation (SIM = 1,75 c.u.). After the load, these indices became equal, but the volumes of quasi-attractors increased by 29 times. Conclusions. Athletes in the North of the Russian Federation can't significantly invert the state of SIM and PAR even after the load. The load only levels these indicators, but at the same time the volume of the quasi-attractor in the five-dimensional phase space of the states of diagnostic signs of the cardiovascular system of athletes increases. Such dynamic differs from the dynamics of the athletes of the Central Part of the Russian Federation, where the SIM indicator initially prevails over the PAR indicator.