Effects of Brain Stimulation on Stroke Recovery
Author Information
Author(s): Friedhelm C. Hummel, Bernhard Voller, Pablo Celnik, Agnes Floel, Pascal Giraux, Christian Gerloff, Leonardo G. Cohen
Primary Institution: National Institute of Neurological Disorders and Stroke, NIH
Hypothesis
Noninvasive anodal tDCS applied to the primary motor cortex of the affected hemisphere would improve reaction time and pinch force compared to Sham stimulation in patients with subcortical stroke.
Conclusion
tDCS of the affected hemisphere can improve performance in simpler motor tasks for patients with higher impairment levels.
Supporting Evidence
- Anodal tDCS shortened reaction times in the paretic hand.
- Improvements in pinch force were observed in patients with higher impairment levels.
- All patients tested showed shortening of reaction times with tDCS.
Takeaway
This study found that a special type of brain stimulation can help stroke patients move their hands better and faster.
Methodology
The study used a double-blind, cross-over design comparing anodal tDCS and Sham stimulation on reaction time and pinch force tasks.
Potential Biases
Potential bias from the small sample size and the subjective nature of self-reported measures.
Limitations
The study was limited to chronic stroke patients and did not assess long-term effects of tDCS.
Participant Demographics
Eleven patients, average age 57 years, with a history of subcortical ischemic stroke; 5 females, 9 right-handed.
Statistical Information
P-Value
p<0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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