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Spectral and network investigation reveals distinct power and connectivity patterns between phasic and tonic REM sleep

T. Avigdor, L. Peter-Derex, A. Ho, K. Schiller, Y. Wang, C. Abdallah, E. Delaire, K. Jaber, V. Travnicek, C. Grova, B. Frauscher

. 2025 ; 48 (8) : . [pub] 20250814

Jazyk angličtina Země Spojené státy americké

Typ dokumentu časopisecké články

Perzistentní odkaz   https://www.medvik.cz/link/bmc25022008

Grantová podpora
RGPIN2020-04127 Natural Sciences and Engineering Research Council of Canada
PJT-175056 CIHR - Canada

E-zdroje Online Plný text

NLK Free Medical Journals od 1978 do Před 6 měsíci
ProQuest Central od 2016-10-01 do Před 1 rokem
Health & Medicine (ProQuest) od 2016-10-01 do Před 1 rokem
Psychology Database (ProQuest) od 2016-10-01 do Před 1 rokem

Odkazy

PubMed 40394955
DOI 10.1093/sleep/zsaf133
Knihovny.cz E-zdroje

Although rapid eye movement (REM) sleep is often thought of as a singular state, it consists of two substates, phasic and tonic REM, defined by the presence (respectively absence) of bursts of rapid eye movements. These two substates have distinct EEG signatures and functional properties. However, whether they exhibit regional specificities remains unknown. Using intracranial EEG recordings from 31 patients, we analyzed expert-labeled segments from tonic and phasic REM and contrasted them with wakefulness segments. We assessed the spectral and connectivity content of these segments using Welch's method to estimate power spectral density and the phase locking value to assess functional connectivity. Overall, we found a widespread power gradient between low and high frequencies (p < 0.05, Cohen's d = 0.17 ± 0.20), with tonic REM being dominated by lower frequencies (p < 0.01, d = 0.18 ± 0.08), and phasic REM by higher frequencies (p < 0.01, d = 0.18 ± 0.19). However, some regions, such as the occipito-temporal areas as well as medial frontal regions, exhibit opposite trends. Connectivity was overall higher in all bands except in the low and high ripple frequency bands in most networks during tonic REM (p < 0.01, d = 0.08 ± 0.09) compared to phasic REM. Yet, functional connections involving the visual network were always stronger during phasic REM when compared to tonic REM. These findings highlight the spatiotemporal heterogeneity of REM sleep which is consistent with the concept of focal sleep in humans.

Citace poskytuje Crossref.org

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