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Definition of Unihemispheric slow-wave sleep

Unihemispheric slow-wave sleep Definition from Social Science Dictionaries & Glossaries
Dream Interpretation & Dream Theories
Condition where only one hemisphere of the brain sleeps at any given moment.
Unihemispheric slow-wave sleep Definition from Encyclopedia Dictionaries & Glossaries
English Wikipedia - The Free Encyclopedia
Unihemispheric slow-wave sleep (USWS) is the ability to sleep with one half of the brain while the other half remains alert. This is in contrast to normal sleep where both eyes are shut and both halves of the brain show reduced consciousness. In USWS, also known as asymmetric slow-wave sleep, one half of the brain is in deep sleep, a form of non-rapid eye movement sleep and the eye corresponding to this half is closed while the other eye remains open. When examined by low voltage electroencephalography (EEG), the characteristic slow-wave sleep tracings are seen from one side while the other side shows a characteristic tracing of wakefulness. The phenomenon has been observed in a number of terrestrial, aquatic and avian species.

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