Cited by 89Sleep and Wakefulness ResearchNeural dynamics and brain functionEEG and Brain-Computer Interfaces

Temporal evolution of coherence and power in the human sleep electroencephalogram

Achermann, Peter, BorbÉly, Alexander·1998·Journal of Sleep Research

Abstract

Coherence analysis of the human sleep electroencephalogram (EEG) was used to investigate relations between brain regions. In all‐night EEG recordings from eight young subjects, the temporal evolution of power and coherence spectra within and between cerebral hemispheres was investigated from bipolar derivations along the antero‐posterior axis. Distinct peaks in the power and coherence spectra were present in NREM sleep but not in REM sleep. They were situated in the frequency range of sleep spindles (13–14 Hz), alpha band (9–10 Hz) and low delta band (1–2 Hz). Whereas the peaks coincided in the power and coherence spectra, a dissociation of their temporal evolution was observed. In the low delta band, only power but not coherence showed a decline across successive NREM sleep episodes. Moreover, power increased gradually in the first part of a NREM sleep episode, whereas coherence showed a rapid rise. The results indicate that the intrahemispheric and interhemispheric coherence of EEG activity attains readily a high level in NREM sleep and is largely independent of the signal amplitude.

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Crossref · 10.1046/j.1365-2869.7.s1.6.x

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  • During human slow wave sleep (SWS), the EEG shows predominant slow wave activity (SWA), defined by the 0.5- to 4.0-Hz frequency band and including <1-Hz slow oscillations with a peak frequency of 0.8 Hz.

    “During human slow wave sleep (SWS), the EEG shows predominant slow wave activity (SWA), which is defined by the 0.5-to 4.0-Hz frequency band and includes the Ͻ1-Hz slow oscillations with a peak frequency of 0.8 Hz (7,830).”

    From About Sleep's Role in Memory (2013) · cites this paper as [7]

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Authors
Achermann, P., & BorbÉly, A.
Affiliations
University of Zurich (CH)
Venue
Journal of Sleep Research
Publisher
Wiley
Published
1998-06
Volume
7
Issue
S1
Pages
36-41
ISSN
  • 0962-1105 (ISSN-L)
  • 1365-2869
OpenAlex
W2043478751
Cited by
89
References
24
Citations by year
2026: 2 · 2025: 3 · 2024: 1 · 2023: 1 · 2022: 2 · 2020: 3 · 2019: 2 · 2018: 5 · 2017: 2 · 2016: 3 · 2015: 1 · 2014: 3 · 2013: 8 · 2012: 7
FWCI
3.54
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Sleep Research (publishedVersion)
  • PubMed (publishedVersion)
Funders
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Sleep and Wakefulness Research
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neural dynamics and brain function
  • Life Sciences › Neuroscience › Cognitive Neuroscience › EEG and Brain-Computer Interfaces
Keywords
EEG coherence, sleep spindles, NREM sleep, REM sleep, alpha band, delta band, intrahemispheric coherence, interhemispheric coherence, cerebral hemispheres
MeSH terms
Electroencephalography, Humans, Sleep, REM, Time Factors

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