A.G. FAZLIAKHMETOVA, E.I. BOGDANOV Kazan State Medical University, 49 Butlerov Str., Kazan, Russian Federation, 420012  Fazliakhmetova A.G. ― postgraduate student of the Department of Neurology and Rehabilitation, tel. +7-917-262-90-04, e-mail: [email protected] Bogdanov E.I. ― D. Med. Sc., Professor of the Department of Neurology and Rehabilitation, tel. (843) 231-21-22, e-mail: [email protected] The article describes the causes […]