Yi Li1, Yun Qu, Mengwei Yuan, Tianhui Du. 1. Department of Rehabilitation Medicine, West China Hospital., Sichuan Provincial Key Laboratory of Rehabilitation Medicine, Sichuan University, Chengdu, Sichuan, People's Republic of China, China.
Abstract
OBJECTIVE: To perform a meta-analysis of studies investigating the effects of low-frequency repetitive transcranial magnetic stimulation on post-stroke aphasia. DATA SOURCES: Studies were identified by performing a search of electronic databases (MEDLINE, Embase, Cochrane Central Register of Controlled Trials (CENTRAL), and Web of Knowledge) for articles published until June 2014. STUDY SELECTION: Randomized controlled trials (RCTs) reporting treatments with low-frequency repetitive transcranial magnetic stimulation in patients with post-stroke aphasia were included. The outcomes included naming, repetition, comprehension, changes in brain excitability, and adverse events. DATA EXTRACTION: Two independent reviewers extracted the data. Study quality was evaluated with the PEDro scale. DATA ANALYSIS: Of the 879 articles identified, 4 RCTs were included in the final analysis. Data synthesis showed that low-frequency repetitive transcranial magnetic stimulation was beneficial for post-stroke patients in terms of naming (standard mean difference (SMD) 0.51; 95% confidence interval (95% CI) 0.16-0.86) and changes in brain excitability (7.6 ± 33.55; 95% CI -10.7-26.20). However, the changes in repetition (SMD 0.31; 95% CI -0.04-0.65) and comprehension (SMD 0.31; 95% CI -0.14-0.75) after stimulation were not significant. No adverse effects were reported. The included studies were of high methodological quality. CONCLUSION: These findings indicate that low-frequency repetitive transcranial magnetic stimulation is an effective treatment for recovery of naming. In addition, this treatment favours reorganization of the left-hemispheric language networks.
OBJECTIVE: To perform a meta-analysis of studies investigating the effects of low-frequency repetitive transcranial magnetic stimulation on post-stroke aphasia. DATA SOURCES: Studies were identified by performing a search of electronic databases (MEDLINE, Embase, Cochrane Central Register of Controlled Trials (CENTRAL), and Web of Knowledge) for articles published until June 2014. STUDY SELECTION: Randomized controlled trials (RCTs) reporting treatments with low-frequency repetitive transcranial magnetic stimulation in patients with post-stroke aphasia were included. The outcomes included naming, repetition, comprehension, changes in brain excitability, and adverse events. DATA EXTRACTION: Two independent reviewers extracted the data. Study quality was evaluated with the PEDro scale. DATA ANALYSIS: Of the 879 articles identified, 4 RCTs were included in the final analysis. Data synthesis showed that low-frequency repetitive transcranial magnetic stimulation was beneficial for post-strokepatients in terms of naming (standard mean difference (SMD) 0.51; 95% confidence interval (95% CI) 0.16-0.86) and changes in brain excitability (7.6 ± 33.55; 95% CI -10.7-26.20). However, the changes in repetition (SMD 0.31; 95% CI -0.04-0.65) and comprehension (SMD 0.31; 95% CI -0.14-0.75) after stimulation were not significant. No adverse effects were reported. The included studies were of high methodological quality. CONCLUSION: These findings indicate that low-frequency repetitive transcranial magnetic stimulation is an effective treatment for recovery of naming. In addition, this treatment favours reorganization of the left-hemispheric language networks.