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Slow-wave sleep: Stage 3 and 4 non-rapid eye movement (non-REM) sleep.
Slow-wave sleep is characterized by brain wave patterns (electroencephalogram or EEG) with a frequency of less than 4 Hz and peak-to-peak amplitude of 75 microV.
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Slow-wave sleep (SWS) is made up of the two deepest stages of non-rapid eye movement sleep.
Learn the definition of slow-wave sleep. ... Definition of Slow-Wave Sleep. By Brandon Peters, M.D., About.com Guide. Updated February 12, 2009
noun Physiology . a recurrent period of deep sleep, typically totaling five or six hours a night, distinguished by the presence of slow brain waves and by very little ...