Evidence map›Paper›PMID 33032390›Full record

ArticleEuropean journal of neurology2021

Functional connectivity and topology in patients with restless legs syndrome: a case-control resting-state functional magnetic resonance imaging study.

N Tuovinen, A Stefani, T Mitterling, A Heidbreder, B Frauscher, E R Gizewski, W Poewe, B Högl, C Scherfler

Open access · greenAbstract read
In one paragraph

Article in European journal of neurology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed, 1 pooled it
2.7field-weighted citation impact, top 9% of its field
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

20 citing papers in PubMed, 1 synthesis or guideline pooled it, 36 citations in OpenAlex.

  1. Pooled it
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  3. Review
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  5. Article
  6. A Comparative Investigation of Functional Connectivity Utilizing Electroencephalography in Insomnia Patients with and without Restless Leg SyndromeClinical psychopharmacology and neuroscience : the official scientific journal of the Korean College of Neuropsychopharmacology · 2024
    Article
  7. Review
  8. Article
  9. Article
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  11. Review
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  13. Review
  14. Article
  15. Myoclonus and other jerky movement disorders.Clinical neurophysiology practice · 2022
    Review
  16. Article
  17. Article
  18. Restless legs syndrome.Nature reviews. Disease primers · 2021
    Review
  19. Review
  20. 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

9 authors at 3 institutions in 3 countries.

N TuovinenDepartment of Psychiatry, Psychotherapy and Psychosomatics, Division of Psychiatry I, Medical University of Innsbruck, Innsbruck, Austria.ORCID 0000-0002-8835-5281
A StefaniDepartment of Neurology, Medical University of Innsbruck, Innsbruck, Austria.ORCID 0000-0003-4259-8824
T MitterlingDepartment of Neurology, Medical University of Innsbruck, Innsbruck, Austria.
A HeidbrederDepartment of Neurology, Medical University of Innsbruck, Innsbruck, Austria.
B FrauscherDepartment of Neurology, Medical University of Innsbruck, Innsbruck, Austria.
E R GizewskiNeuroimaging Research Core Facility, Medical University of Innsbruck, Innsbruck, Austria.ORCID 0000-0001-6859-8377
W PoeweDepartment of Neurology, Medical University of Innsbruck, Innsbruck, Austria.ORCID 0000-0003-4367-0971
B HöglDepartment of Neurology, Medical University of Innsbruck, Innsbruck, Austria.ORCID 0000-0003-1894-7641
C ScherflerDepartment of Neurology, Medical University of Innsbruck, Innsbruck, Austria.ORCID 0000-0002-4885-5265
Innsbruck Medical University · ATJohannes Kepler University of Linz · ATMontreal Neurological Institute and Hospital · CA

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

background and purposeFunctional connectivity studies revealed alterations within thalamic, salience, and default mode networks in restless legs syndrome patients.

methodsEighty-two patients with restless legs syndrome (untreated, n = 30; on dopaminergic medication, n = 42; on alpha-2-delta ligands as mono- or polytherapy combined with dopaminergic medication, n = 10), and 82 individually age- and gender-matched healthy controls were studied with resting-state functional magnetic resonance imaging. Connectivity of 12 resting-state networks was investigated with independent component analysis, and network topology was studied with graph methods among 410 brain regions.

resultsPatients with restless legs syndrome showed significantly higher connectivity within salience (p = 0.029), executive (p = 0.001), and cerebellar (p = 0.041) networks, as well as significantly lower (p < 0.05) cerebello-frontal communication compared to controls. In addition, they had a significantly higher (p < 0.05) clustering coefficient and local efficiency in motor and frontal regions; lower clustering coefficient in the central sulcus; and lower local efficiency in the central opercular cortex, temporal, parieto-occipital, cuneus, and occipital regions compared to controls. Untreated patients had significantly lower (p < 0.05) cerebello-parietal communication compared to healthy controls. Connectivity between the thalamus and frontal regions was significantly increased (p < 0.05) in patients on dopaminergic medication compared to untreated patients and controls.

conclusionsNetworks with higher intranetwork connectivity (i.e., salience, executive, cerebellar) and lower cerebello-frontal connectivity in the restless legs syndrome patients, as well as lower cerebello-parietal connectivity in untreated patients, correspond to regions associated with attention, response inhibitory control, and processing of sensory information. Intact cerebello-parietal communication and increased thalamic connectivity to the prefrontal regions in patients on dopaminergic medication suggests a treatment effect on thalamus.

Indexed as

Restless Legs SyndromeBrainBrain MappingCase-Control StudiesCerebral CortexHumansMagnetic Resonance ImagingThalamusbrain connectivityfunctional magnetic resonance imagingrestless legs syndromesleep wake disorders

Identifiers

PMID33032390
PMCPMC7820983
OpenAlexW3091957992

What OpenQuestion holds

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LicenceCC BY-NC-ND
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.