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Dreaming and Insomnia: Link between Physiological REM Parameters and Mentation Characteristics

Authors
  • Benz, Fee
  • Riemann, Dieter
  • Feige, Bernd
Type
Published Article
Journal
Brain Sciences
Publisher
MDPI AG
Publication Date
Jun 16, 2020
Volume
10
Issue
6
Identifiers
DOI: 10.3390/brainsci10060378
PMID: 32560193
PMCID: PMC7348747
Source
PubMed Central
Keywords
Disciplines
  • Article
License
Green

Abstract

(1) Background: An unresolved phenomenon of insomnia disorder is a discrepancy between objectively measured sleep and subjective complaints. It has been shown that rapid eye movement (REM) sleep might be especially vulnerable to an altered perception. The present work aimed to investigate the link between physiological REM parameters and mentation characteristics in REM sleep. (2) Methods: 22 patients with insomnia and 23 good sleepers indicating at least one REM mentation within an awakening study were included. Multivariate analyses of variance (MANOVAs) were calculated to examine group differences and effects of mentation characteristics on number of arousals, REM density, and spectral power prior to awakenings. (3) Results: Increased perceived wakefulness was related to lower delta, theta, and alpha power in the minute prior to the REM awakenings. Nevertheless, no group differences regarding spectral power were found. With respect to number of arousals and REM density, no significant effects of mentation characteristics and no group differences were found. (4) Conclusions: Our results suggest that spectral power in REM sleep is linked with altered sleep perception. Reduced delta, theta, and alpha power might be a signature of this modified REM sleep associated with a high level of perceived wakefulness. Future awakening studies are necessary to further explore the link between physiological REM parameters and sleep perception.

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