Evidence map›Paper›PMID 34984464›Full record

ArticleSleep2023

Automatic analysis of muscular activity in the flexor digitorum superficialis muscles: a fast screening method for rapid eye movement sleep without atonia.

Matteo Cesari, Anna Heidbreder, Carles Gaig, Melanie Bergmann, Elisabeth Brandauer, Alex Iranzo, Evi Holzknecht, Joan Santamaria, Birgit Högl, Ambra Stefani

Abstract read
In one paragraph

Article in Sleep, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.

0numbers the graph read from it
0cells of the map it votes in
10citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

10 citing papers in PubMed.

  1. Article
  2. Article
  3. The Future of Parasomnias.Journal of sleep research · 2025
    Review
  4. Review
  5. Rapid eye movement sleep without atonia in patients with sleep-related fronto-temporal epilepsy.Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology · 2025
    Article
  6. Validation of automated detection of REM sleep without atonia using in-laboratory and in-home recordings.Journal of clinical sleep medicine : JCSM : official publication of the American Academy of Sleep Medicine · 2025
    Article
  7. Review
  8. Contemporary diagnostic visual and automated polysomnographic REM sleep without atonia thresholds in isolated REM sleep behavior disorder.Journal of clinical sleep medicine : JCSM : official publication of the American Academy of Sleep Medicine · 2024
    Article
  9. Article
  10. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

10 authors.

Matteo CesariDepartment of Neurology, Medical University of Innsbruck, Innsbruck, Austria.ORCID 0000-0001-6554-1033
Anna HeidbrederDepartment of Neurology, Medical University of Innsbruck, Innsbruck, Austria.
Carles GaigNeurology Service, Hospital Clínic of Barcelona, Barcelona, Spain.
Melanie BergmannDepartment of Neurology, Medical University of Innsbruck, Innsbruck, Austria.
Elisabeth BrandauerDepartment of Neurology, Medical University of Innsbruck, Innsbruck, Austria.
Alex IranzoNeurology Service, Hospital Clínic of Barcelona, Barcelona, Spain.
Evi HolzknechtDepartment of Neurology, Medical University of Innsbruck, Innsbruck, Austria.
Joan SantamariaNeurology Service, Hospital Clínic of Barcelona, Barcelona, Spain.
Birgit HöglDepartment of Neurology, Medical University of Innsbruck, Innsbruck, Austria.
Ambra StefaniDepartment of Neurology, Medical University of Innsbruck, Innsbruck, Austria.ORCID 0000-0003-4259-8824

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

STUDY

objectivesTo identify a fast and reliable method for rapid eye movement (REM) sleep without atonia (RWA) quantification.

methodsWe analyzed 36 video-polysomnographies (v-PSGs) of isolated REM sleep behavior disorder (iRBD) patients and 35 controls' v-PSGs. Patients diagnosed with RBD had: i) RWA, quantified with a reference method, i.e. automatic and artifact-corrected 3-s Sleep Innsbruck Barcelona (SINBAR) index in REM sleep periods (RSPs, i.e. manually selected portions of REM sleep); and ii) v-PSG-documented RBD behaviors. We quantified RWA with other (semi)-automated methods requiring less human intervention than the reference one: the indices proposed by the SINBAR group (the 3-s and 30-s phasic flexor digitorum superficialis (FDS), phasic/"any"/tonic mentalis), and the REM atonia, short and long muscle activity indices (in mentalis/submentalis/FDS muscles). They were calculated in whole REM sleep (i.e. REM sleep scored following international guidelines), in RSPs, with and without manual artifact correction. Area under curves (AUC) discriminating iRBD from controls were computed. Using published cut-offs, the indices' sensitivity and specificity for iRBD identification were calculated. Apnea-hypopnea index in REM sleep (AHIREM) was considered in the analyses.

resultsRWA indices from FDS muscles alone had the highest AUCs and all of them had 100% sensitivity. Without manual RSP selection and artifact correction, the "30-s phasic FDS" and the "FDS long muscle activity" had the highest specificity (85%) with AHIREM < 15/h. RWA indices were less reliable when AHIREM≥15/h.

conclusionsIf AHIREM<15/h, FDS muscular activity in whole REM sleep and without artifact correction is fast and reliable to rule out RWA.

Indexed as

REM Sleep Behavior DisorderSleep, REMElectromyographyFacial MusclesHumansMuscle HypotoniaMuscle, SkeletalFDSRBDREM sleep without atoniaRWASINBARupper extremities

Identifiers

PMID34984464
PMCPMC9995778

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.