Augmented efficacy of intermittent theta burst stimulation on the virtual reality-based cycling training for upper limb function in patients with stroke: a double-blinded, randomized controlled trial.
Yu-Hsin Chen, Chia-Ling Chen, Ying-Zu Huang and 4 others
PMID 34059090WHAT IT FOUND
Adding brain stimulation to virtual reality cycling reduced spasticity and improved participation in stroke patients.
However, it did not improve upper limb motor function compared to sham stimulation plus the same exercise. The benefit was specific to tone and daily life involvement, not movement quality.
Key findings
01The iTBS group showed significantly greater reduction in upper limb spasticity (MAS-UE) than the sham group.
02There was no significant difference between the iTBS and sham groups in upper limb motor function (FMA-UE).
03The iTBS group reported significantly greater improvements in participation (SIS) and actual use of the affected arm (MAL-AOU) compared to the sham group.
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 a very small sample size (23 completers), which limits the reliability of the findings. Convenience sampling was used, recruiting only from a rehabilitation ward, which may not represent the broader stroke population. There was no long-term follow-up to see if the benefits in spasticity and participation lasted after the 15-day intervention ended. The study did not correct for multiple comparisons, increasing the risk of finding false positive results. Participants were restricted to ages 30-70, so results may not apply to younger or older patients.
Declared interests
The study was funded by the Ministry of Science and Technology and the Chang Gung Medical Foundation. No commercial conflicts of interest were declared.
The easy way to misread this
Do not assume that adding brain stimulation to VR training will improve upper limb motor function or dexterity more than VR training alone. The study found no significant difference between the real and sham stimulation groups for the primary motor function outcome (FMA-UE). The benefits were specific to spasticity and participation.