[Chronobiological characteristics of stroke and poststroke cognitive impairment].

Objective: To study chronobiological characteristics of ischemic stroke (II) and post stroke cognitive impairment (CI).

Material And Methods: We examined 80 patients with acute ischemic stroke. The cognitive status, sleep quality, chronobiological parameters and night urinary level of 6-sulfatoxymelatonin were assessed.

[Frontotemporal degeneration: a clinical case and experience of using of diffusion tensor magnetic-resonance imaging tractography].

Frontotemporal degeneration is a frequent cause of presenile dementia that makes up from 5 to 17% of autopsy-confirmed cases developed at the age of 70 years. Authors report a case of this disease, discuss the possible causes of its development and present the results of diffusion tensor magnetic resonance tractography. Clinical features of this case are practically isolated speech disturbance with the most likely domination of a semantic variant of primary progressive aphasia.