Evidence map›Paper›PMID 34270614›Full record

ArticlePloS one2021

Anodal transcranial direct current stimulation increases corticospinal excitability, while performance is unchanged.

Mathias Kristiansen, Mikkel Jacobi Thomsen, Jens Nørgaard, Jon Aaes, Dennis Knudsen, Michael Voigt

Abstract read
In one paragraph

Article in PloS one, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.

0numbers the graph read from it
0cells of the map it votes in
7citing 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

7 citing papers in PubMed.

  1. Trial
  2. Trial
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  4. Review
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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

6 authors.

Mathias KristiansenDepartment of Health Science and Technology, Sport Sciences-Performance and Technology, Aalborg University, Aalborg, Denmark.ORCID 0000-0003-2372-2543
Mikkel Jacobi ThomsenDepartment of Health Science and Technology, Sport Sciences-Performance and Technology, Aalborg University, Aalborg, Denmark.
Jens NørgaardDepartment of Health Science and Technology, Sport Sciences-Performance and Technology, Aalborg University, Aalborg, Denmark.
Jon AaesDepartment of Health Science and Technology, Sport Sciences-Performance and Technology, Aalborg University, Aalborg, Denmark.
Dennis KnudsenDepartment of Health Science and Technology, Sport Sciences-Performance and Technology, Aalborg University, Aalborg, Denmark.
Michael VoigtDepartment of Health Science and Technology, Sport Sciences-Performance and Technology, Aalborg University, Aalborg, Denmark.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Anodal transcranial direct current stimulation (a-tDCS) has been shown to improve bicycle time to fatigue (TTF) tasks at 70-80% of VO2max and downregulate rate of perceived exertion (RPE). This study aimed to investigate the effect of a-tDCS on a RPE-clamp test, a 250-kJ time trial (TT) and motor evoked potentials (MEP). Twenty participants volunteered for three trials; control, sham stimulation and a-tDCS. Transcranial magnetic stimulation was used to determine the corticospinal excitability for 12 participants pre and post sham stimulation and a-tDCS. The a-tDCS protocol consisted of 13 minutes of stimulation (2 mA) with the anode placed above the Cz. The RPE-clamp test consisted of 5 minutes ergometer bicycling at an RPE of 13 on the Borg scale, and the TT consisted of a 250 kJ (∼10 km) long bicycle ergometer test. During each test, power output, heart rate and oxygen consumption was measured, while RPE was evaluated. MEPs increased significantly by 36% (±36%) post a-tDCS, with 8.8% (±31%) post sham stimulation (p = 0.037). No significant changes were found for any parameter at the RPE-clamp or TT. The lack of improvement may be due to RPE being more controlled by afferent feedback during TT tests than during TTF tests. Based on the results of the present study, it is concluded that a-tDCS applied over Cz, does not enhance self-paced cycling performance.

Indexed as

AdultAthletic PerformanceBicyclingEvoked Potentials, MotorFemaleHealthy VolunteersHumansMaleMotor CortexPyramidal TractsTranscranial Direct Current StimulationTranscranial Magnetic StimulationYoung Adult

Identifiers

PMID34270614
PMCPMC8284656

What OpenQuestion holds

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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.