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Evolution of sleep and sleep EEG after hemispheric stroke
Jacqueline Vock1, Peter Achermann, Matthias Bischof
1Department of Neurology, Inselspital, University Hospital, Bern, Switzerland.
Journal of Sleep Research
|December 5, 2002
Summary
Stroke patients frequently experience sleep changes, but EEG abnormalities are rare. Good sleep continuity in the acute phase of a stroke predicts a better long-term clinical outcome.
Area of Science:
- Neurology
- Sleep Medicine
- Neuroscience
Background:
- The impact of hemispheric stroke on sleep patterns and electroencephalogram (EEG) is understudied.
- The link between sleep variables and stroke recovery outcomes remains largely unknown.
Purpose of the Study:
- To investigate the evolution of subjective sleep and sleep EEG in patients following hemispheric stroke.
- To determine the relationship between sleep variables and long-term clinical outcomes after stroke.
Main Methods:
- Studied 27 patients with first hemispheric ischemic stroke across acute, subacute, and chronic phases.
- Assessed estimated sleep time (EST) and Epworth Sleepiness Score (ESS) pre- and post-stroke.
- Compared sleep EEG data with 11 controls and published norms.
Main Results:
- Frequent changes in EST and ESS were observed, but correlated poorly with sleep EEG alterations.
- No significant chronic-phase sleep EEG differences were found between patients and controls.
- High acute-phase sleep efficiency and low wakefulness after sleep onset predicted good long-term outcomes.
Conclusions:
- Hemispheric strokes can lead to various sleep disturbances, but persistent sleep EEG abnormalities are uncommon.
- Improved sleep EEG continuity from the acute to chronic phases is significant.
- High sleep EEG continuity in the acute stroke phase is a positive prognostic indicator for clinical outcome.
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