Vol 21, No 12 (2014)

There have been studied separate compensatory-adaptive reactions of the respiratory system in 39 military men of special task units in dynamics of service and fighting task performance. It has been established that organism’s abilities of adaption to organization of necessary functional structures with its stable preservation in optimum state resulted in development of compensatory adaptability of the military men’s respiratory system regardless of the length of their service. The received results allowed to suggest dependence of compensatory- adaptive reactions of the military men’s respiratory system on the nature of the service and fighting tasks performance with possibility of full recovery at the end of 1 month after the return of the military men to the permanent base without carrying out of additional rehabilitation measures.

The article has presented the results of a study of the brain bioelectrical activity and cerebral energy exchange in 60 northern children aged 9-10 years (30 boys and 30 girls). Functional state of the central nervous system was assessed with use of electroencephalography and the method of the DC-potential recording. The results indicated that age development of the northern schoolchildren occurred in connection with adaptation to a complex of severe factors of the North and was characterized by lower frequency of alpha-rhythms and a higher level of theta - and delta-activities, especially in the frontal areas. It was accompanied by higher energy consumption of the brain in general and reduction of energy consumption in the frontal areas of the northern children compared to their peers in the central regions of Russia. These facts indicated relative immaturity of the brain and manifestations of functional stress associated with impact of adverse climatic and environmental conditions of the North on the children.

The review has summarized the present knowledge reflecting urgency, incidence and causes of pregnancies among adolescents, their reproductive preferences and attitudes to contraceptive methods. A social portrait of adolescent pregnant girls has been shown. Statistical data have been given on choices of minors in pregnancy; adolescents’ attitude to abortions, social and psychological aspects contributing to abortions, as well as features of clinical course of pregnancy, delivery and perinatal outcomes in this age category.

The effect of changes of the geomagnetic field on human electroencephalograms (EEG) has been studied. Based on the fact that the relationship between the characteristics of the geomagnetic field and the EEG was not linear, the method of recurrence quantification analysis (RQA) was used. EEGs were recorded in 16 sites of the left and right hemispheres in three background states. Subjects (10 people) participated in the multi-day studies. 9 recurrence indexes (RR, DET, L, DIV, ENTR, RATIO, LAM, TT, CLEAN) were calculated for each of the 16 EEG sites. The correlation coefficients were calculated for each index with the global and local coefficients of geomagnetic activity. Since each recurrence index showed significant individual dynamics in the course of the series, the data for all 9 indexes were averaged. All EEG recurrent indexes showed a reliable correlation with the geomagnetic activity, and the number of correlations in the left hemisphere was significantly bigger than in the right one. A significant excess in the number of correlations in the left temporal area (T3) compared to the right one (T4) has been found. It has been concluded that the geomagnetic field had the most pronounced effect on the temporal lobes.