title: [Changes in the stages of nocturnal sleep in man with a lesion of the hypothalamus-brain stem structures].
abstract: Polygraphic study of nocturnal sleep in 18 patients with affection of the hypothalamo-mesencephalic structures showed a reduction of the duration of the II stage and a prolongation of the III and IV stages of slow sleep in comparison with the corresponding indices in the patients with involvement of the ponto-bulbar structures (9) and in healthy persons (8) of control group. Analysis of the qualitative indices of the EEG of slow sleep (a relative amount of the sleep spindles per 1 min of the II stage, delta-index and the  delta-wave amplitude at the II and the IV stages) demonstrated a tendency to their increase in the patients with affection of the hypothalamo-mesencephalic structures. Patients of this group showed a decreased frequency of spontaneous changes of sleep from deeper to more superficial stages.
mesh_terms: D000293:Adolescent; D000328:Adult; D001927:Brain Diseases / Q000503:physiopathology*; D001932:Brain Neoplasms / Q000503:physiopathology*; D001933:Brain Stem / Q000503:physiopathology*; D002908:Chronic Disease; D004569:Electroencephalography; D004576:Electromyography; D006801:Humans; D007031:Hypothalamus / Q000503:physiopathology*; D008526:Medulla Oblongata / Q000503:physiopathology; D008875:Middle Aged; D011930:Reaction Time; D012894:Sleep Stages / Q000502:physiology*
vernacular_title: Izmeneniia stadiĭ nochnogo sna cheloveka pri porazhenii gipotalamo-stvolovykh struktur