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Randomized, Triple-Blind, and Parallel-Controlled Trial of Transcranial Direct Current Stimulation for Cognitive Rehabilitation after Stroke
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Non-invasive cortical stimulation improves post-stroke attention decline.

Eun Kyoung Kang1, Min Jae Baek, Sangyun Kim

  • 1Department of Rehabilitation Medicine, Seoul National University Bundang Hospital, Seongnam, South Korea.

Restorative Neurology and Neuroscience
|January 1, 2010
PubMed
Summary

Non-invasive brain stimulation using transcranial direct current stimulation (tDCS) improved attention in stroke patients. This excitatory anodal tDCS applied to the left dorsolateral prefrontal cortex shows promise for rehabilitation.

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Area of Science:

  • Neuroscience
  • Cognitive Rehabilitation
  • Neuromodulation

Background:

  • Attention deficits are common after stroke, hindering rehabilitation.
  • Non-invasive brain stimulation techniques like tDCS offer potential for behavioral modification by altering cortical excitability.

Purpose of the Study:

  • To investigate if a single session of anodal transcranial direct current stimulation (tDCS) to the left dorsolateral prefrontal cortex (DLPFC) can enhance attention in stroke patients.

Main Methods:

  • A double-blind, sham-controlled, crossover study involving 10 stroke patients and 10 healthy controls.
  • Real (2 mA for 20 min) or sham tDCS applied to the left DLPFC.
  • Attention assessed using a computerized Go/No-Go test pre- and post-intervention.

Main Results:

  • Stroke patients showed significant improvement in response accuracy 1-3 hours after real tDCS compared to baseline (P<0.05).
  • Sham stimulation did not yield significant accuracy improvements in stroke patients (P>0.05).
  • No significant attention improvements were observed in healthy controls with either real or sham tDCS.

Conclusions:

  • Anodal tDCS applied to the left DLPFC effectively improved attention in stroke patients compared to sham stimulation.
  • Non-invasive cortical stimulation may be a valuable tool for attention enhancement during stroke rehabilitation.