Evidence map›Paper›PMID 30312350›Full record

Observational studyPloS one2018

Functional network connectivity is altered in patients with upper limb somatosensory impairments in the acute phase post stroke: A cross-sectional study.

Nele De Bruyn, Sarah Meyer, Simon S Kessner, Bea Essers, Bastian Cheng, Götz Thomalla, Andre Peeters, Stefan Sunaert, Thierry Duprez, Vincent Thijs and 3 more

Abstract readObservational Study
In one paragraph

Observational study in PloS one, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
13citing papers in PubMed, 1 pooled it
–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

13 citing papers in PubMed, 1 synthesis or guideline pooled it.

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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

13 authors.

Nele De BruynKU Leuven-University of Leuven, Department of Rehabilitation Sciences, Leuven, Belgium.ORCID 0000-0002-8011-1303
Sarah MeyerKU Leuven-University of Leuven, Department of Rehabilitation Sciences, Leuven, Belgium.
Simon S KessnerUniversity Medical Center Hamburg-Eppendorf, Department of Neurology, Hamburg, Germany.
Bea EssersKU Leuven-University of Leuven, Department of Rehabilitation Sciences, Leuven, Belgium.
Bastian ChengUniversity Medical Center Hamburg-Eppendorf, Department of Neurology, Hamburg, Germany.
Götz ThomallaUniversity Medical Center Hamburg-Eppendorf, Department of Neurology, Hamburg, Germany.
Andre PeetersCliniques Universitaires Saint-Luc, Department of Neurology, Brussels, Belgium.
Stefan SunaertKU Leuven-University of Leuven, Department of Imaging and Pathology, Leuven, Belgium.
Thierry DuprezCliniques Universitaires Saint-Luc, Department of Radiology, Brussels, Belgium.
Vincent ThijsUniversity of Melbourne, Florey Institute of Neuroscience and Mental Health, Victoria, Australia.
Hilde FeysKU Leuven-University of Leuven, Department of Rehabilitation Sciences, Leuven, Belgium.
Kaat AlaertsKU Leuven-University of Leuven, Department of Rehabilitation Sciences, Leuven, Belgium.
Geert VerheydenKU Leuven-University of Leuven, Department of Rehabilitation Sciences, Leuven, Belgium.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundAberrant functional connectivity in brain networks associated with motor impairment after stroke is well described, but little is known about the association with somatosensory impairments.

aimThe objective of this cross-sectional observational study was to investigate the relationship between brain functional connectivity and severity of somatosensory impairments in the upper limb in the acute phase post stroke.

methodsNineteen first-ever stroke patients underwent resting-state functional magnetic resonance imaging (rs-fMRI) and a standardized clinical somatosensory profile assessment (exteroception and higher cortical somatosensation) in the first week post stroke. Integrity of inter- and intrahemispheric (ipsilesional and contralesional) functional connectivity of the somatosensory network was assessed between patients with severe (Em-NSA< 13/32) and mild to moderate (Em-NSA> 13/32) somatosensory impairments.

resultsPatients with severe somatosensory impairments displayed significantly lower functional connectivity indices in terms of interhemispheric (p = 0.001) and ipsilesional intrahemispheric (p = 0.035) connectivity compared to mildly to moderately impaired patients. Significant associations were found between the perceptual threshold of touch assessment and interhemispheric (r = -0.63) and ipsilesional (r = -0.51) network indices. Additional significant associations were found between the index of interhemispheric connectivity and light touch (r = 0.55) and stereognosis (r = 0.64) evaluation.

conclusionPatients with more severe somatosensory impairments have lower inter- and ipsilesional intrahemispheric connectivity of the somatosensory network. Lower connectivity indices are related to more impaired exteroception and higher cortical somatosensation. This study highlights the importance of network integrity in terms of inter- and ipsilesional intrahemispheric connectivity for somatosensory function. Further research is needed investigating the effect of therapy on the re-establishment of these networks.

Indexed as

AgedAged, 80 and overArmCross-Sectional StudiesFemaleHumansMagnetic Resonance ImagingMaleMiddle AgedMotor CortexNerve NetNeuroimagingParietal LobeSensorimotor CortexSeverity of Illness IndexSomatosensory Disorders

Identifiers

PMID30312350
PMCPMC6185852

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Registered trials

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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.