Funding: the study was ordered by the Research Center of Neurology (Federal Research Institution).

Author contribution: Fokin VF — data analysis, article authoring; Ponomareva NV — psychometric and neuroimaging data collection and analysis, participation in authoring the article; Konovalov RN — neuroimaging, processing of the results; Krotenkova MV — neuroimaging, analysis of the results; Medvedev RB — clinical examinations, analysis of the literature; Lagoda OV — analysis of the clinical data; Tanashyan MM — generalization of the clinical material in the context of the results obtained.