BACKGROUND: Previous works showed potentially beneficial effects of a single session of peripheral nerve sensory stimulation (PSS) on motor function of a paretic hand in patients with subacute and chronic stroke. OBJECTIVE: To investigate the influence of the use of different stimulus intensities over multiple sessions (repetitive PSS [RPSS]) paired with motor training. METHODS: To address this question, 22 patients were randomized within the second month after a single hemispheric stroke in a parallel design to application of 2-hour RPSS at 1 of 2 stimulus intensities immediately preceding motor training, 3 times a week, for 1 month. Jebsen-Taylor test (JTT, primary endpoint measure), pinch force, Functional Independence Measure (FIM), and corticomotor excitability to transcranial magnetic stimulation were measured before and after the end of the treatment month. JTT, FIM scores, and pinch force were reevaluated 2 to 3 months after the end of the treatment. RESULTS:Baseline motor function tests were comparable across the 2 RPSS intensity groups. JTT improved significantly in the lower intensity RPSS group but not in the higher intensity RPSS group at month 1. This difference between the 2 groups reduced by months 2 to 3. CONCLUSIONS: These results indicate that multiple sessions of RPSS could facilitate training effects on motor functionafter subacute stroke depending on the intensity of stimulation. It is proposed that careful dose-response studies are needed to optimize parameters of RPSS stimulation before designing costly, larger, double-blind, multicenter clinical trials.
RCT Entities:
BACKGROUND: Previous works showed potentially beneficial effects of a single session of peripheral nerve sensory stimulation (PSS) on motor function of a paretic hand in patients with subacute and chronic stroke. OBJECTIVE: To investigate the influence of the use of different stimulus intensities over multiple sessions (repetitive PSS [RPSS]) paired with motor training. METHODS: To address this question, 22 patients were randomized within the second month after a single hemispheric stroke in a parallel design to application of 2-hour RPSS at 1 of 2 stimulus intensities immediately preceding motor training, 3 times a week, for 1 month. Jebsen-Taylor test (JTT, primary endpoint measure), pinch force, Functional Independence Measure (FIM), and corticomotor excitability to transcranial magnetic stimulation were measured before and after the end of the treatment month. JTT, FIM scores, and pinch force were reevaluated 2 to 3 months after the end of the treatment. RESULTS: Baseline motor function tests were comparable across the 2 RPSS intensity groups. JTT improved significantly in the lower intensity RPSS group but not in the higher intensity RPSS group at month 1. This difference between the 2 groups reduced by months 2 to 3. CONCLUSIONS: These results indicate that multiple sessions of RPSS could facilitate training effects on motor function after subacute stroke depending on the intensity of stimulation. It is proposed that careful dose-response studies are needed to optimize parameters of RPSS stimulation before designing costly, larger, double-blind, multicenter clinical trials.
Authors: Alain Kaelin-Lang; Andreas R Luft; Lumy Sawaki; Aaron H Burstein; Young H Sohn; Leonardo G Cohen Journal: J Physiol Date: 2002-04-15 Impact factor: 5.182
Authors: John Chae; Mary Y Harley; Terri Z Hisel; Catherine M Corrigan; Jeffrey A Demchak; Yu-Tung Wong; Zi-Ping Fang Journal: Neurorehabil Neural Repair Date: 2009-01-20 Impact factor: 3.919
Authors: Alma S Merians; Gerard G Fluet; Qinyin Qiu; Soha Saleh; Ian Lafond; Amy Davidow; Sergei V Adamovich Journal: J Neuroeng Rehabil Date: 2011-05-16 Impact factor: 4.262
Authors: Na Jin Seo; Kishor Lakshminarayanan; Abigail W Lauer; Viswanathan Ramakrishnan; Brian D Schmit; Colleen A Hanlon; Mark S George; Leonardo Bonilha; Ryan J Downey; Will DeVries; Tibor Nagy Journal: Exp Brain Res Date: 2019-01-03 Impact factor: 1.972