Sensory Stimulation and Robot-Assisted Arm Training After Stroke: A Randomized Controlled Trial
Marion Egger1, Jeannine Bergmann, Carmen Krewer
1Department of Neurology, Research Group, Schoen Clinic Bad Aibling, Bad Aibling, Germany (M.E., J.B., C.K., K.J., F.M.); Institute for Medical Information Processing, Biometry and Epidemiology (IBE), Faculty of Medicine, LMU Munich, Pettenkofer School of Public Health, Munich, Germany (M.E.); German Center for Vertigo and Balance Disorders (DSGZ), Ludwig-Maximilians-Universität in Munich, Munich, Germany (J.B., K.J.); and Chair of Human Movement Science, Department of Sports and Health Sciences, Technical University of Munich, Munich, Germany (C.K.).
Repetitive sensory stimulation (RSS) combined with robot-assisted therapy was feasible for stroke survivors. However, this add-on therapy did not show significant sensorimotor improvements compared to sham stimulation.
Area of Science:
- Neurorehabilitation
- Robotics in Medicine
- Sensory Stimulation
Background:
- Stroke recovery is often limited, with robot-assisted therapy showing potential.
- Repetitive sensory stimulation (RSS) may enhance neuroplasticity and sensorimotor function.
- The combination of RSS and robot-assisted therapy has not been extensively studied.
Purpose of the Study:
- To investigate the feasibility of RSS as an add-on therapy before robot-assisted arm training.
- To evaluate the sensorimotor effects of RSS combined with robot-assisted therapy in subacute stroke patients.
- To compare RSS with sham stimulation in conjunction with robot-assisted therapy.
Main Methods:
- Forty subacute stroke participants with moderate to severe arm paresis were randomized.
- Participants received 12 sessions of either RSS or sham stimulation over 3 weeks.
- Robot-assisted arm therapy followed each stimulation session, with assessments at baseline, post-intervention, and follow-up.
Main Results:
- Both groups showed sensorimotor function improvements from baseline to follow-up.
- No statistically significant differences were observed between the RSS and control groups for any outcome measure.
- The stimulation protocols were well-tolerated, with no reported safety concerns.
Conclusions:
- Robot-assisted therapy preceded by RSS is feasible in stroke patients with moderate to severe arm paresis.
- RSS as an add-on to robot-assisted training did not demonstrate a preliminary effect over sham stimulation.
- Potential reasons for the lack of significant findings include participant severity or dilution of effects by combined therapies.
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