Corticomuscular coupling study for post-stroke rehabilitation: a scoping review.
Shuai Feng, Xianxian Yu, Yinfan Guo and 4 others
PMID 41316368WHAT IT FOUND
Scoping 89 studies, brain-muscle coupling drops in stroke patients, especially distally.
It correlates with recovery and guides neuromodulation. But small samples, no unified protocols, and technical noise mean it is not yet a clinical tool.
Key findings
01Stroke patients show reduced corticomuscular coupling, particularly in distal muscles and beta/gamma bands, which correlates with motor function scores.
02Neuromodulation and electrical stimulation can alter coupling patterns, with some evidence linking increased coupling to motor recovery.
03Clinical use is blocked by small sample sizes, lack of standardized analysis methods, and technical challenges in signal synchronization.
STILL TO COME
How it was doneWhat they foundWhat it means for PTsWhat it means for OTs
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What it does not show
The review included 89 studies, but most had small sample sizes, limiting the generalizability of any single finding. There is no standardized method for analyzing CMC, so results across studies are hard to compare. Technical issues like signal noise and synchronization errors make clinical application difficult. The screening process was conducted by a single author, which may introduce selection bias. The review focuses on motor and sensory functions, excluding cognitive and language outcomes.
Declared interests
The study was funded by the National Key Research and Development Program of China, the National Natural Science Foundation of China, the Shenzhen Municipal Science, Technology and Innovation Commission, and Sun Yat-sen University. The authors declared no competing interests.
The easy way to misread this
Do not interpret the correlation between increased CMC and motor recovery as proof that raising CMC causes recovery. The studies are observational or small pilots, and the direction of causality is not established.
Summarised by AI from the full paper, without a clinician reviewing it. Check it against the source before it changes what you do. Read it on PubMed →