ADAPTIVE READJUSTMENT STRATEGY IN FUNCTIONAL SYSTEMS OF CAUCASIANS BORN AND ROOTED IN RUSSIA’S NORTHEAST IN DIFFERENT GENERATIONS

Abstract

Abstract One thousand six hundred and thirty-two male volunteers, all students aged 181.1 yrs, Caucasian by ethnicity, migrants or residents of Russias northeast born in 1-3 generations participated in the somatometric, cardiohemodynamic, and gas exchange assessment, which was conducted to determine the strategy of adaptive readjustments that occur in the body functional systems. Result: By analyzing main indicators in generation dynamics we could see that migrants and 1st generation residents were those whose cardiohemodynamic and energy exchange systems experienced constant stress and inadequate functioning under extreme conditions of Magadan region, while the 3rd generation subjects exhibited optimal performance of the studied systems. We found that those born in the 3rd generation demonstrated their adaptive strategy in increasing the systolic volume at lowered arterial pressure and total peripheral resistance, and elevating the contribution of the high frequency component and total power of the heart rhythm spectrum. That was a new level of the changed influence of both regulation components on the heart rhythm which could be seen in the changed balance of its statistical and spectral wave characteristics. In addition, the level of cardiovascular system adaptability to the North extremes is both the variables of the body physiological indicators and the integral structure of their correlations: their quantity, positive or negative nature, coefficient values, and total significance. Conclusion: All these can evaluate both rigidity and plasticity of functional systems. In general, we can conclude that overall strategy of adaptive changes in cardio hemodynamic and gas exchange shown by rooted residents of the North, in the row from 0 to 3rd generation, aims at reducing total energy costs in functional systems, increasing parasympathetic contribution, developing a new interaction between the links of autonomic nervous regulation, as well as at qualitative and quantitative changes in the structure and patterns of correlation clusters. The obtained results have complemented the understanding of physiological mechanisms of adaptive morphofunctional readjustments experienced by young Caucasian men rooted in Russias Northeast in different generations.