title: Evolution of sleep and sleep EEG after hemispheric stroke.
abstract: The evolution of subjective sleep and sleep electroencephalogram (EEG) after hemispheric stroke have been rarely studied and the relationship of sleep variables to stroke outcome is essentially unknown. We studied 27 patients with first hemispheric ischaemic stroke and no sleep apnoea in the acute (1-8 days), subacute (9-35 days), and chronic phase (5-24 months) after stroke. Clinical assessment included estimated sleep time per 24 h (EST) and Epworth sleepiness score (ESS) before stroke, as well as EST, ESS and clinical outcome after stroke. Sleep EEG data from stroke patients were compared with data from 11 hospitalized controls and published norms. Changes in EST (>2 h, 38% of patients) and ESS (>3 points, 26%) were frequent but correlated poorly with sleep EEG changes. In the chronic phase no significant differences in sleep EEG between controls and patients were found. High sleep efficiency and low wakefulness after sleep onset in the acute phase were associated with a good long-term outcome. These two sleep EEG variables improved significantly from the acute to the subacute and chronic phase. In conclusion, hemispheric strokes can cause insomnia, hypersomnia or changes in sleep needs but only rarely persisting sleep EEG abnormalities. High sleep EEG continuity in the acute phase of stroke heralds a good clinical outcome.
authors.affiliation: Department of Neurology, Inselspital, University Hospital, Bern, Switzerland.
authors.forename: Jacqueline
authors.initials: J
authors.lastname: Vock
authors.forename: Peter
authors.initials: P
authors.lastname: Achermann
authors.forename: Matthias
authors.initials: M
authors.lastname: Bischof
authors.forename: Milena
authors.initials: M
authors.lastname: Milanova
authors.forename: Caroline
authors.initials: C
authors.lastname: Müller
authors.forename: Arto
authors.initials: A
authors.lastname: Nirkko
authors.forename: Corinne
authors.initials: C
authors.lastname: Roth
authors.forename: Claudio L
authors.initials: CL
authors.lastname: Bassetti
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001921:Brain / Q000098:blood supply / Q000503:physiopathology*; D002545:Brain Ischemia / Q000150:complications / Q000503:physiopathology*; D006970:Disorders of Excessive Somnolence / Q000175:diagnosis / Q000209:etiology; D004569:Electroencephalography; D005260:Female; D007839:Functional Laterality / Q000502:physiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D012720:Severity of Illness Index; D007319:Sleep Initiation and Maintenance Disorders / Q000175:diagnosis / Q000209:etiology; D012895:Sleep, REM / Q000502:physiology*