Effects of mirror therapy on upper limb motor function of patients with stroke: A systematic review and meta-analysis of randomized controlled trials.

After a stroke, regaining use of the arm and hand is often one of the hardest parts of recovery, and mirror therapy, where a patient watches the reflection of their unaffected limb to encourage movement in the affected one, has been proposed as one way to help. This review pooled results from eighteen randomized controlled trials involving 633 stroke patients to see whether mirror therapy actually improves upper limb motor function. The pooled results showed a statistically significant improvement in overall upper limb motor function and in hand function specifically with mirror therapy compared to control. Effects appeared stronger when therapy was delivered more than five times a week over four weeks or less, though this was a subgroup finding.

The main limitation is that most included trials had some methodological concerns according to the risk-of-bias assessment, and the abstract notes that evidence on shoulder, elbow, forearm, wrist function, and coordination between the arms remains too limited to draw firm conclusions.

If you or someone you know is recovering arm or hand movement after a stroke, you may have heard of mirror therapy, a technique where you watch the reflection of your unaffected arm in a mirror while trying to move the affected one. This review looked at eighteen studies involving 633 stroke patients to see whether this approach actually helps. The results showed a statistically significant improvement in overall arm and hand function among people who did mirror therapy compared to those who didn't, with the improvement in hand function specifically.

There was also a hint that doing it more often, more than five times a week for four weeks or less, was linked to bigger improvements, though this comes from a smaller subgroup of the evidence. It's worth knowing that most of the studies included had some concerns about their methods, which means the results should be viewed with some caution. There also wasn't enough evidence yet to say clearly whether mirror therapy helps with shoulder, elbow, wrist movement, or coordination between the two arms.

This is a summary of research, not medical advice. Talk to your own healthcare provider about anything affecting your care.

When considering how to support upper limb recovery after stroke, a recurring clinical question is whether add-on approaches like mirror therapy, where patients watch a mirrored reflection of the unaffected limb during movement of the affected one, offer measurable benefit over standard care. This meta-analysis pooled eighteen randomized controlled trials with 633 participants and found a statistically significant pooled improvement in overall upper limb motor function (mean difference 1.79, 95% CI 0.04 to 3.54) and in hand function specifically (mean difference 1.48, 95% CI 0.17 to 2.78). Subgroup analysis suggested larger effects when mirror therapy was delivered more than five times weekly over four weeks or less (mean difference 3.26, 95% CI 1.19 to 5.33), but this is an exploratory subgroup finding rather than the primary comparison, and dosing conclusions should be read with that caveat.

Confidence intervals for the main effects were wide and close to the null in places, indicating a real but modest and somewhat uncertain effect. Methodological quality was a concern across the evidence base: sixteen of the eighteen trials were rated as having some risk-of-bias concerns using the Cochrane RoB-2 tool. The abstract also specifies that evidence for shoulder, elbow, forearm, and wrist function, and for interlimb coordination, remains insufficient, so this review's contribution is specifically to overall motor and hand function outcomes rather than the full upper limb kinetic chain.