Половые различия межполушарной асимметрии нейроэнергометаболизма у молодых людей, проживающих в Арктической зоне РФ

Abstract

In the Arctic region, adaptive reactions of the body put pressure on its functional systems and are accompanied by changes in cerebral energy metabolism in the central nervous system. Despite the fact that patterns of interhemispheric asymmetry and interaction are part of the brain’s essential, fundamental mechanism, no data is currently available on the neurometabolic features of interhemispheric asymmetry in men and women living in the Arctic zone of the Russian Federation. The aim of this paper was to identify the differences in cerebral energy metabolism in men and women born and living in the Arctic zone of the Russian Federation with different types of interhemispheric asymmetry according to the distribution of DC-potential level. Materials and methods. The study involved 63 subjects (30 men and 33 women) aged 30–34 years born and living in Arkhangelsk. Cerebral energy metabolism was assessed using the 5-channel Neuro-KM hardware and software complex. Distribution of DC-potential level was analysed by mapping the monopolar values and calculating their gradients. To calculate interhemispheric asymmetry of cerebral energy metabolism, an interhemispheric gradient was used, i.e. the potential difference between the right and left temporal leads (Td-Ts). The obtained DC-potential level results were compared with average standard values. The results of the study indicate differences in the distribution of the processes of cerebral energy metabolism in men and women with different types of hemispheric dominance. The most balanced cerebral metabolism was identified in men with right hemisphere dominance and in women with left hemisphere dominance. The presence of sex-related differences in the hemispheric asymmetry of cerebral energy metabolism may reflect different strategies of adaptation to the climatic conditions of northern latitudes in men and women.