ИСТИНА

The aim of the work is to investigate the brain mechanisms of mathematical abilities, determined by K. Mangina’s Test. The composition of the test includes a set of pair geometric figures, in which the first small figure is an element of a more complex - the second figure. The study was carried out by a group of young people (10 people) studying at the Faculty of Mechanics and Mathematics of Moscow State University. The purpose of the work is to reveal the function of the alpha rhythm as a possible marker of Parkinson’s disease. The author’s method was used - “Microstructural analysis of brain oscillatory activity”, which works with narrow band frequency selective generators (Danilova, 2002). The method determines the localization of activated brain structures in different hemispheres and in accordance with the coordinates of the “Stereotactic Atlas of the Human Brain” (Talairach, Tournoux, 1988). When the alpha generators were divided into two frequency ranges (8-11 Hz and 11-13 Hz), new data were obtained about their connection with different hemispheres. Only in the left hemisphere within three seconds there was an increase in activity of low-frequency alpha rhythm (8-11 Hz), whereas in the right hemisphere activity of highfrequency alpha rhythm (11-13 Hz) decreased. In this case, the increase in the activity of theta-generators occurred in parallel in both hemispheres. Two other groups of high-frequency alpha (11-13 Hz) in the left hemisphere and low-frequency (8-11 Hz) in the right hemisphere had a very low level of activity. For all three time intervals in solving mathematical abilities, the level of the low-frequency alpha rhythm was significantly higher than the level of activity of the high-frequency alpha rhythm (n = 10, p b0.05, T crit = 10, T emp = 9). The duration of theta generator activity was shorter than the alpha of the generators in solving the mathematical abilities of the Test K. Mangina. The growth of alpha generator activity in solving mathematical abilities was revealed in Posterior Cingular BA 30, Anterior Temporal G. BA 20, as well as in the subcortical structures of the brain. The brain structures that were activated by theta-generators were concentrated in different sections of the Cingular cortex. The fact that alpha generators are involved in many brain structures emphasizes their very important function - as a special mechanism of local inhibition. The work is supported by the grant of the RNF No. 14-18-03253 P.