O.S. Sushkova - Junior Research Scientist, Kotelnikov IRE RAS (Moscow). Е-mail: o.sushkova@mail.ru А.А. Morozov - Ph.D. (Phys.-Math.), Senior Research Scientist, Kotelnikov IRE RAS (Moscow) A.V. Gabova - Ph.D. (Biol.), Senior Research Scientist, Institute of Higher Nervous Activity and Neurophysiology of RAS