Using Subthreshold Vibratory Stimulation During Poststroke Rehabilitation Therapy: A Case Series.

Area of Science:

• Neuroscience
• Rehabilitation Medicine
• Biomedical Engineering

Background:

• Subthreshold vibratory stimulation primes the sensorimotor cortex.
• Previous studies show improved 2-week upper extremity (UE) outcomes.
• Chronic stroke survivors often have persistent UE deficits.

Purpose of the Study:

• Assess feasibility, safety, and preliminary efficacy of vibratory stimulation.
• Evaluate the intervention over a 6-week therapy duration.
• Determine potential as an adjunct to standard UE therapy.

Main Methods:

• Four chronic stroke survivors participated.
• Intervention involved 6 weeks of vibratory stimulation during therapy.
• Feasibility, safety, and efficacy assessed at baseline, post-therapy, and 1-month follow-up.
• Outcome measures included Wolf Motor Function Test, accelerometry, and Stroke Impact Scale.

Main Results:

• All participants found the stimulation feasible and comfortable.
• No serious or moderate adverse events were reported.
• Significant improvements observed in Wolf Motor Function Test scores and UE use.
• Improvements exceeded minimal detectable change and clinical important difference thresholds.

Conclusions:

• Vibratory stimulation is feasible and safe for 6-week UE rehabilitation.
• Preliminary efficacy suggests potential as a valuable therapy adjunct.
• Further investigation in larger trials is warranted to confirm these findings.