Адрес этой статьи в интернете: www.biophys.ru/archive/congress2012/proc-p274.htm
1Establishment of the Russian Academy of Sciences Institute for Terrestrial Magnetism, Ionosphere, and Radio wave Propagation (IZMIRAN), 142190, Troitzk, Moscow Region, Russia, fasmirnov-1@mail.ru.
Plenty of technological processes are known to be damaged by magnetic storms. But technology is controlled by men and their functional systems may be damaged as well. We are going to consider the electo-neurophysiological aspect of the general problem formulated and investigated at first by V.I. Vernadsky and А.L. Chihjevsky: men surrounded by geophysical fields including ones of cosmic origination.
The electroneurophysiological effect of geomagnetic storms was observed for a group of 15 students (practically healthy girls and boys from 18 to 23 years old). To control the main functional systems of the men under investigation, their electroencephalograms (EEG) were being registered along with electrocardiograms, respiratory rhythms, arterial blood pressure and other characteristics during a year. According to the EEG investigations during implementation of the proof-reading test in absence of magnetic storms, the values of the coherence function of time series of the theta-rhythm oscillations of electric potentials of the frontal and occipital parts of the head belong to the interval [0.3, 0.7] for nearly all of the students under investigation. (As the proof-reading test, it was necessary to choose given symbols from a random sequence of ones demonstrated at a monitor and to enter the number of the symbols discovered in a computer. Everyone was known that the time for determination of symbols is unlimited. On the other hand, nobody was known that the EEG and other registrations mentioned are connected with geophysical events of cosmic origination).
Let us formulate the main result: by implementation of the same test during a magnetic storm, 5 ≤ K ≤ 6, or no later then 24 hours after it (the IZMIRAN’s data regarding the cosmic weather were used), the values of the coherence function of time series of the theta-rhythm oscillations of electric potentials of the frontal and occipital parts of all of the students occurred to be decreased considerably: 2 to 3 times or more including the case with zero coherence after a magnetic storm. The result about decreasing of the coherence of the brain low frequency bioelectric oscillations under a magnetic storm influence was obtained by two methods: 1) comparison of the time series of bioelectric oscillations of a given person without a magnetic storm and under its influence; 2) comparison of two sets of time series of oscillations: a) the set A of time series measured without a magnetic storm and b) the set B of time series measured under its influence, regardless to an individual. (Surely, the total number of the EEGs available for the investigation by the set’s approach, i.e. without personification, is more then the number of the EEGs available by the individual approach of the first method because there were ones investigated without a magnetic storm only as well as ones investigated under its influence only). The result of the set’s approach is as follows: set A and B may be distinguished distinctively, namely, the part of the cases of the decreased coherence in set B surpasses twice similar part of set A. So, the result of the set’s approach is the same as for the individual approach: magnetic storm decreases the coherence of time series of the theta-rhythm oscillations of electric potentials of the frontal and occipital parts of the head. By the EEG measurements with closed or open eyes, but without a functional load on the brain in the form of the proof-reading test, a distinctive decrease of the coherence function was not observed during a magnetic storm as well as for pairs of points from other parts of the head (see above) or other rhythms.