Relationship between musculoskeletal factors in the shoulder and upper limb function in patients with stroke: A cross-sectional study.
Jiyeon Lee, Jinseop Kim
PMID 41477568WHAT IT FOUND
In chronic stroke, a wider shoulder gap and thinner supraspinatus and deltoid muscles on the affected side correlated with slower hand function and lower manual ability scores.
These structural changes tracked with functional limits, but the study shows association only, not that treating them restores function.
Key findings
01The affected shoulder had a significantly wider acromion-greater tuberosity distance and thinner supraspinatus and deltoid muscles than the unaffected side.
02On the affected side, greater shoulder gap and thinner supraspinatus and deltoid muscles correlated with poorer performance on hand function tasks.
03Supraspinatus and deltoid thicknesses were strongly correlated with each other, suggesting weakness rarely affects only one of these shoulder stabilisers.
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
Only 18 participants were studied, and no power calculation was performed, so these correlations are preliminary and could be unstable. The study recruited only patients with chronic stroke at least six months post-onset, so results do not apply to acute or subacute recovery. Participants had mild or no spasticity and some functional movement, so findings do not generalise to more severely affected patients. Muscle tone and spasticity were not analysed, yet these factors also affect hand function. The cross-sectional design shows association only; it cannot establish that shoulder structural changes cause the functional limits. All participants were recruited from a single rehabilitation hospital in Korea, which may limit applicability to other populations.
Declared interests
The authors declare no funding or grant support and no conflict of interest.
The easy way to misread this
Do not conclude that strengthening the supraspinatus and deltoid or reducing shoulder subluxation will improve hand function. This study measured association at one time point in a small chronic cohort and did not test any intervention.
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 →