Graduated from St. Petersburg I.P.Pavlov Medical University in 1981, has a Highest Medical Category and is an author of dissertations for degrees of candidate of medical science /1991/ and doctor of medical science /2007/. For almost 30 years works at the Department of Geriatric Psychiatry at the National Medical Research Center of Psychiatry and Neurology named after V.M.Bekhterev in St.Petersburg, Russia. Now he is a Chief Researcher and also the Professor of Medical Faculty in Saint Petersburg University. Being a psychiatrist as a basic speciality, L.S.Kruglov also participated in the World Federation of Neurology Continuing Medical Education Program and in 2006 received a respective certificate. In common, he is an author of more then 90 publications. Among them is a book “Clinico-social aspects of treatment of old age patients with psychoorganic syndrome of vascular genesis”. Besides, L.S.Kruglov is an author of several training appliances for psychiatrists and neurologists, systematically reads lectures for this specialists in his native city and country in whole.