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

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081731%3A_____%2F25%3A00643252" target="_blank" >RIV/68081731:_____/25:00643252 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00159816:_____/25:00082348

Výsledek na webu

<a href="https://academic.oup.com/sleep/article/48/8/zsaf133/8139669" target="_blank" >https://academic.oup.com/sleep/article/48/8/zsaf133/8139669</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1093/sleep/zsaf133" target="_blank" >10.1093/sleep/zsaf133</a>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

30210 - Clinical neurology

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Sleep

ISSN

0161-8105

e-ISSN

1550-9109

Svazek periodika

48

Číslo periodika v rámci svazku

8

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

15

Strana od-do

zsaf133

Kód UT WoS článku

001517678500001

EID výsledku v databázi Scopus

2-s2.0-105013317854