You'll have to ask your doctor how to implement subthreshold vibration.
Neuroplasticity after upper extremity rehabilitation therapy with sensory stimulation in chronic stroke survivors
Christian Schranz, 1 Amanda Vatinno, 1 Viswanathan Ramakrishnan2 and Na Jin Seo 1,3,4
This study investigated the effect of using subthreshold vibration as a peripheral sensory stimulation during therapy on cortical activity. Secondary analysis of a pilot triple-blinded randomized controlled trial. Twelve chronic stroke survivors underwent 2-week upper-extremity task-practice therapy. Half received subthreshold vibratory stimulation on their paretic wrist (treatment
group) and the other half did not (control). EEG connectivity and event-related de-/resynchronization for the sensorimotor network during hand grip were examined at pre-intervention, post-intervention and follow-up. Statistically significant group by time interactions were observed for both connectivity and event-related spectral perturbation. For the treatment group, connectivity increased at
post-intervention and decreased at follow-up. Event-related desynchronization decreased and event-related resynchronization increased at post-intervention, which was maintained at follow-up. The control group had the opposite trend for connectivity and no change in event-related spectral perturbation. The stimulation altered cortical sensorimotor activity. The findings complement
the clinical results of the trial in which the treatment group significantly improved gross manual dexterity while the control group did not. Increased connectivity in the treatment group may indicate neuroplasticity for motor learning, while reduced event-related desynchronization and increased event-related resynchronization may indicate lessened effort for grip and improved inhibitory con
trol. EEG may improve understanding of neural processes underlying motor recovery.
1 Department of Health Sciences and Research, Medical University of South Carolina, Charleston, SC 29425, USA
2 Department of Public Health Sciences, Medical University of South Carolina, Charleston, SC 29425, USA
3 Department of Rehabilitation Sciences, Medical University of South Carolina, Charleston, SC 29425, USA
4 Ralph H. Johnson VA Medical Center, Charleston, SC 29401, USA
Correspondence to: Christian Schranz, PhD
77 President Street, Charleston
SC 29425, USA
E-mail: schranz@musc.edu
Keywords: EEG; coherence; ERSP; vibratory stimulation; upper extremity
Abbreviations: ERD = event-related desynchronization; ERS = event-related resynchronization
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