Methodology of Individual Brain Activity Monitoring in Interrelations with Geomagnetic Field Variations in the Arctic
DOI: 10.22138/2500-0918-2018-15-2-316-323
L.V. Poskotinova, T.A. Zenchenko, E.V. Krivonogova, D.B. Demin
N. Laverov Federal Center for Integrated Arctic Research, Russian Academy of Sciences, Arkhangelsk, Russian Federation;
Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, Pushchino, Russian Federation;
Space Research Institute, Russian Academy of Sciences, Moscow, Russian Federation
Abstract. Improvement of methodological approaches is relevant in the Arctic zone of the Russian Federation, thanks to which it is possible to predict the degree of adaptation of the human central nervous system to variations in the geomagnetic field (GMF). The aim of the study was to test the method of determining the individual sensitivity of the rhythm-setting structures of the human brain to daily variations in the parameters of the GMF vector components using correlation analysis. Methods. Monitoring during 13 series (30 min each) of electroencephalogram (EEG) parameters on March 14–18, 2014 (morning, afternoon, evening) was performed in the Arkhangelsk region (60°52/ N 39°31/ E) with the participation of 4 persons. Time-synchronized one-minute values of the X- and Y-components of GMF vector from the site http://ottawa.intermagnet.org/data-donnee/download-eng.php on the Nurmijarvi geophysical station were used. After removal of the noise spectrum and trends Spearman rank correlation coefficient (p<0.05) total EEG spectral power (in ?Volt2) in each frequency EEG band and EEG leads to fluctuations X and Y components of the vector GMP was calculated. Results. In all participants of the monitoring, the GMF variations are most related (in 7 or more series of 13) with changes in the high-frequency (14–35 Hz) and low-frequency (Hz to 4) EEG bands. Most rarely (less than half of all series) the EEG theta-range (4–7 Hz) indicators were involved in correlation relationships. Conclusion. EEG response in the alpha band (8–13 Hz) in response to the diurnal variation of the components of the GMF vector under conditions of a calm geomagnetic situation turned out to be the most individualized. By the highest degree of involvement of the high-frequency component of the EEG in such correlations, it can be assumed that the cerebral-hippocampal brain system is primarily sensitive to variations in the geomagnetic field in humans, but especially individuals with a high individual EEG alpha-rhythm frequency.
Keywords: geomagnetic field, electroencephalogram, Arctic
Received 09.04.2018
For citation:
Poskotinova L.V., Zenchenko T.A., Krivonogova E.V., Demin D.B. Methodology of Individual Brain Activity Monitoring in Interrelations with Geomagnetic Field Variations in the Arctic. Vestn. Ural. Med. Akad. Nauki. = Journal of Ural Medical Academic Science. 2018, Vol. 15, no. 2, pp. 316–323. DOI: 10.22138/2500-0918-2018-15-2-316-323 (In Russ)
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Authors
Liliya V. Poskotinova
N. Laverov Federal Center for Integrated Arctic Research, Russian Academy of Sciences
Dr. Sci. (Biol.), Assistant Prof., Chief Researcher, Head of Biorhythmology Laboratory, The Institute of Environmental Physiology
Russian Federation, 163000, Arkhangelsk, Lomonosov Ave., 249
liliya200572@mail.ru
Tatyana A. Zenchenko
Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences
Dr. Sci. (Biol.), Senior Researcher
Russian Federation, 142290, Pushchino, Institutskaya street, 3
Space Research Institute, Russian Academy of Sciences
Russian Federation, 117997, Moscow, Profsoyuznaya, 84/32
zench@mail.ru
Elena V. Krivonogova
N. Laverov Federal Center for Integrated Arctic Research, Russian Academy of Sciences
Cand. Sci. (Biol.), Senior Researcher of Biorhythmology Laboratory, The Institute of Environmental Physiology
Russian Federation, 163000, Arkhangelsk, Lomonosov Ave., 249
elena200280@mail.ru
Denis B. Demin
N. Laverov Federal Center for Integrated Arctic Research, Russian Academy of Sciences.
Dr. Sci. (Med.), Senior Researcher of Biorhythmology Laboratory, The Institute of Environmental Physiology
Russian Federation, 163000, Arkhangelsk, Lomonosov Ave., 249
denisdemin@mail.ru
