Objective: To investigate whether the direct application of vibratory stimuli inhibits spasticity and improves motor function in the hemiplegic upper limbs of post-stroke patients.
Design: Prospective pilot study.
Setting: University hospital rehabilitation centre.
Subjects: Fourteen post-stroke patients (mean age = 57.3 years; SD = 19.1 years).
Interventions: A hand and forearm stimulation device and an upper-arm stimulation device, consisting of vibrators, a wooden frame and a cloth strap, applied to the upper limbs of subjects.
Main Measures: The modified Ashworth scale (MAS) score, F-wave parameters and motor-function parameters (finger tapping, active range of motion and the simple test for evaluating hand function).
Results: Subjects showed significant and potentially durable improvements in MAS score (p < 0.01), F-wave parameters (p < 0.01) and motor-function parameters (p < 0.05). The MAS score, F-wave parameters and motor-function parameters dropped below the baseline values after vibratory stimulation. The MAS score and F-wave parameters remained significantly below the baseline 30 minutes after stimulation.
Conclusions: The direct application of vibratory stimuli is an effective non-pharmacological anti-spastic treatment that could facilitate stroke rehabilitation. These results provide good evidence of potential short-term benefits of anti-spastic vibratory therapy in post-stroke patients in terms of decreased muscle tonus and improved motor function.
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