Can state or response entropy be used as a measure of sleep depth?
Affiliation
Department of Anaesthesia and Intensive Care Medicine, Cork University Hospital, and University College Cork, Cork, Ireland. rsimahon@hotmail.comIssue Date
2012-02-03T15:16:05ZMeSH
AdolescentAdult
Electroencephalography/methods
Entropy
Female
Humans
Male
Middle Aged
Polysomnography/*methods
Prospective Studies
*Signal Processing, Computer-Assisted
*Sleep Stages
Young Adult
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Anaesthesia. 2008 Dec;63(12):1309-13.Journal
AnaesthesiaDOI
10.1111/j.1365-2044.2008.05675.xPubMed ID
19032298Abstract
SUMMARY: In this prospective observational study we examined the potential of the spectral entropy measures 'state' and 'response' entropy (Entropy monitor), as measures of sleep depth in 12 healthy adult subjects. Both median state and response entropy values varied significantly with sleep stage (p = 0.017 and p = 0.014 respectively; ANOVA). Median state or response entropy did not decrease significantly during the transition from awake to stage I sleep (p > 0.017). State entropy values decreased significantly between sleep stages I and II (p < 0.001). Both state and response entropy values were significantly less (40 and 45 arbitrary units respectively) in stage III (slow wave sleep) vs stage II sleep (p = 0.008). We conclude that state and response entropy values, when expressed as a function of time, may be a useful means of quantifying aspects of sleep.Language
engISSN
1365-2044 (Electronic)0003-2409 (Linking)
ae974a485f413a2113503eed53cd6c53
10.1111/j.1365-2044.2008.05675.x
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