Slow-wave sleep

Slow-wave sleep (SWS), often referred to as deep sleep, is the third stage of non-rapid eye movement sleep (NREM), where electroencephalography activity is characterised by slow delta waves.[2]

Slow-wave sleep usually lasts between 70 and 90 minutes, taking place during the first hours of the night.[3] Slow-wave sleep is characterised by moderate muscle tone, slow or absent eye movement, and lack of genital activity. Slow-wave sleep is considered important for memory consolidation, declarative memory, and the recovery of the brain from daily activities.

Before 2007, the term slow-wave sleep referred to the third and fourth stages of NREM. Current terminology combined these into a single stage three.[4]: 291 

  1. ^ Lesku JA, Meyer LC, Fuller A, Maloney SK, Dell'Omo G, Vyssotski AL, Rattenborg NC (2011). Balaban E (ed.). "Ostriches sleep like platypuses". PLOS ONE. 6 (8): e23203. Bibcode:2011PLoSO...623203L. doi:10.1371/journal.pone.0023203. PMC 3160860. PMID 21887239.
  2. ^ Rechtschaffen A, Kales A (1968). A Manual of Standardized Terminology, Techniques and Scoring System for Sleep Stages of Human Subjects. US Dept of Health, Education, and Welfare; National Institutes of Health.
  3. ^ Reinoso Suárez, F. (1999). "[The neurobiology of slow-wave sleep]". Anales de la Real Academia Nacional de Medicina. 116 (1): 209–224, discussion 224–226. ISSN 0034-0634. PMID 10554397.
  4. ^ Carlson NR (2013). Physiology of behavior (Eleventh ed.). Boston: Pearson. ISBN 978-0-205-23939-9.
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