Evidence map›Paper›PMID 33184382›Full record

ArticleScientific reports2020

High definition transcranial direct current stimulation modulates abnormal neurophysiological activity in post-stroke aphasia.

Priyanka P Shah-Basak, Gayatri Sivaratnam, Selina Teti, Alexander Francois-Nienaber, Maryam Yossofzai, Sabrina Armstrong, Sumiti Nayar, Regina Jokel, Jed Meltzer

Open access · goldAbstract read
In one paragraph

Article in Scientific reports, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 25 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
25citing papers in PubMed, 1 pooled it
2.0field-weighted citation impact, top 13% 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

25 citing papers in PubMed, 1 synthesis or guideline pooled it, 44 citations in OpenAlex.

  1. Pooled it
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  9. Review
  10. Secondary thalamic dysfunction underlies abnormal large-scale neural dynamics in chronic stroke.Proceedings of the National Academy of Sciences of the United States of America · 2024
    Article
  11. Article
  12. Article
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  15. Article
  16. Article
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  18. Targeted neurorehabilitation strategies in post-stroke aphasia.Restorative neurology and neuroscience · 2023
    Review
  19. Reversing the Ruin: Rehabilitation, Recovery, and Restoration After Stroke.Current neurology and neuroscience reports · 2022
    Review
  20. Review
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 4 institutions in 1 country.

Priyanka P Shah-BasakRotman Research Institute, Baycrest Health Sciences, Toronto, ON, M6A 2E1, Canada. prishah@mcw.edu.
Gayatri SivaratnamRotman Research Institute, Baycrest Health Sciences, Toronto, ON, M6A 2E1, Canada.
Selina TetiRotman Research Institute, Baycrest Health Sciences, Toronto, ON, M6A 2E1, Canada.
Alexander Francois-NienaberRotman Research Institute, Baycrest Health Sciences, Toronto, ON, M6A 2E1, Canada.
Maryam YossofzaiRotman Research Institute, Baycrest Health Sciences, Toronto, ON, M6A 2E1, Canada.
Sabrina ArmstrongRotman Research Institute, Baycrest Health Sciences, Toronto, ON, M6A 2E1, Canada.
Sumiti NayarDepartment of Medicine, McMaster University, Hamilton, ON, L8S 4L8, Canada.
Regina JokelRotman Research Institute, Baycrest Health Sciences, Toronto, ON, M6A 2E1, Canada.
Jed MeltzerRotman Research Institute, Baycrest Health Sciences, Toronto, ON, M6A 2E1, Canada.
Baycrest Hospital · CAHeart and Stroke Foundation · CAMcMaster University · CAUniversity of Toronto · CA

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Recent findings indicate that measures derived from resting-state magnetoencephalography (rsMEG) are sensitive to cortical dysfunction in post-stroke aphasia. Spectral power and multiscale entropy (MSE) measures show that left-hemispheric areas surrounding the stroke lesion (perilesional) exhibit pathological oscillatory slowing and alterations in signal complexity. In the current study, we tested whether individually-targeted high-definition transcranial direct current stimulation (HD-tDCS) can reduce MEG abnormalities and transiently improve language performance. In eleven chronic aphasia survivors, we devised a method to localize perilesional areas exhibiting peak MSE abnormalities, and subsequently targeted these areas with excitatory/anodal-tDCS, or targeted the contralateral homolog areas with inhibitory/cathodal-tDCS, based on prominent theories of stroke recovery. Pathological MEG slowing in these patients was correlated with aphasia severity. Sentence/phrase repetition accuracy was assessed before and after tDCS. A delayed word reading task was administered inside MEG to assess tDCS-induced neurophysiological changes in relative power and MSE computed on the pre-stimulus and delay task time windows. Results indicated increases in repetition accuracy, decreases in contralateral theta (4-7 Hz) and coarse-scale MSE (slow activity), and increases in perilesional low-gamma (25-50 Hz) and fine-scale MSE (fast activity) after anodal-tDCS, indicating reversal of pathological abnormalities. RsMEG may be a sensitive measure for guiding therapeutic tDCS.

Indexed as

MagnetoencephalographyAdultAgedAged, 80 and overAphasiaFemaleHumansLanguageMaleMiddle AgedSeverity of Illness IndexStrokeStroke RehabilitationTranscranial Direct Current Stimulation

Identifiers

PMID33184382
PMCPMC7665190
OpenAlexW3099389886

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.