PeerJ Reviewer Match - Brain stimulation for hand function

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Effects of exercise with brain stimulation on hand function in children with cerebral palsy: A meta-analysis of randomized controlled trials

Abstract

Abstract Background. Cerebral palsy (CP) is a paediatric condition generally characterized by persistent motor disabilities in hand function. This review examined the impact of exercise with and without brain stimulation on hand function in children with CP. Methodology. A systematic literature search was conducted from January 2010 to June 2025 across four electronic databases: Web of Science, Scopus, PubMed, and EBSCO. This review established the inclusion criteria as follows: 1. Children with CP; 2. Randomised controlled trial; 3. Exercise with and without brain stimulation; 4. Measurements included gross motor function (GMF), fine manual control (FMC) and grip strength (GS) evaluated at pre- and post-intervention. The quality of the included studies was assessed using the Cochrane Risk of Bias tool. For data analysis, the standardized mean difference (SMD) was selected as the appropriate effect size index, and RevMan 5.4 software was employed to analyze the mean differences in the data extracted from the included articles. Results. The results showed that exercise with brain stimulation comprising more than 16 sessions could notably improve GS [SMD, 1.38 (0.88, 1.88), p < 0.05, I² = 0%], whereas that comprising fewer than 10 sessions did not demonstrate a significant effect [SMD, 0.19 (-0.29, 0.67), p = 0.44, I² = 0%]. Consequently, brain stimulation intervention could substantially enhance FMC [SMD, 0.46 (0.15, 0.76), p < 0.05, I² = 47%]. Subgroup analysis also presented that exercise with transcranial direct current stimulation (tDCS) resulted in a significant improvement in FMC [SMD, 0.71 (0.29, 1.14), p < 0.05, I² = 49%] compared to exercise with repetitive transcranial magnetic stimulation [SMD, 0.19 (-0.25, 0.63), p = 0.09, I² = 47%]. Conclusion. This review demonstrated that exercise with brain stimulation could significantly enhance hand function in children experiencing CP. Specifically, selecting tDCS intervention plans that consisted of more than 16 sessions could yield greater benefits.

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