Commercial head-mounted display virtual reality for upper extremity rehabilitation in chronic stroke: a single-case design study.
Mattias Erhardsson, Margit Alt Murphy, Katharina S Sunnerhagen
PMID 33228710WHAT IT FOUND
Seven people with chronic stroke played commercial VR games for ten weeks.
Most showed improved arm function on clinical tests. The games required no button pressing, allowing those with severe weakness to participate using straps. This is a small pilot, not proof of efficacy.
Key findings
01Six participants completed the intervention, and five showed noticeable improvements in upper extremity activity capacity as measured by the Action Research Arm Test.
02The most played game, Beat Saber, allowed individuals with severe hand weakness to participate by attaching controllers with Velcro straps, as it required no button pressing.
03Participants who had better baseline motor function (ARAT > 15, FMA-UE > 30) responded more clearly to the intervention than those with severe impairment.
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 study had only seven participants, making it a pilot with very low certainty. The design was non-randomized and non-blinded, so causal relationships cannot be determined. Baseline trends were not perfectly stable, with some participants showing improvement during the baseline phase itself, which complicates the interpretation of intervention effects. One participant dropped out due to a fall at home, reducing the sample for analysis. Two participants received other intensive rehabilitation between the intervention and follow-up, which may have contributed to their outcomes. The results cannot be generalized to the wider stroke population.
Declared interests
The authors declared no competing interests. The study was supported by grants from the Swedish Research Council and the Swedish Heart-Lung Foundation.
The easy way to misread this
Do not conclude that VR is proven to improve stroke recovery. This was a small, non-randomized pilot with only seven participants. The observed improvements could be due to natural recovery, the repetitive nature of the weekly assessments themselves acting as therapy, or other concurrent rehabilitation received by some participants. It is a signal for further research, not a recommendation for clinical practice.