Yakovenko Irina A. Petrenko Nadejda E. Cheremoushkin Evgeniy A. Dorokhov Vladimir B. Bakaeva Zarina B. Yakunina Elena B. Torshin Vladimir I. Starshinov Yuri P. Sveshnikov Dmitry S. Influence of lack of night sleep on the cognitive set by indicators of EEG rhythms coupling