Enhanced phasic sensory afferents paired with controlled constraint force improve weight shift toward the paretic side in individuals post-stroke

Seoung Hoon Park, Weena Dee, Renee Keefer, Elliot J. Roth, William Z. Rymer, Ming Wu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Purpose: The goal of this study was to determine whether enhanced phasic sensory afferent input paired with the application of controlled constraint force during walking would improve weight shift toward the paretic side and enhance use of the paretic leg. Methods: Fourteen stroke survivors participated in two experimental conditions, sessions that consisted of 1 min treadmill walking without force and stimulation (baseline), 7 min walking with either “constraint force and sensory stimulation (constraint+stim)” or “constraint force only (constraint)” (adaptation), and then 2 min walking without force and stimulation (post-adaptation). Kinematics of the pelvis and legs, and muscle activity of the paretic leg were recorded. Results: Participants showed greater increases in hip abductor (p < 0.001) and adductor (p = 0.04) muscle activities, weight shift toward the paretic side (p = 0.002), and step length symmetry (p < 0.01) during the late post-adaptation period in the “constraint+stim” condition, compared with the effect of the “constraint” condition. In addition, changes in overground walking speed from baseline to 10 min post treadmill walking was significantly greater for the “constraint force and stimulation” condition than for the “constraint force only” condition (p = 0.04). Conclusion: Enhanced targeted sensory afferent input during locomotor training may facilitate recruitment of targeted muscles of the paretic leg and facilitate use-dependent motor learning of locomotor tasks, which might retain longer and partially transfer from treadmill to overground walking, in stroke survivors.

Original languageEnglish (US)
Article number107035
JournalJournal of Stroke and Cerebrovascular Diseases
Volume32
Issue number4
DOIs
StatePublished - Apr 2023

Keywords

  • Constraint induced movement therapy
  • Forced use
  • Locomotion
  • Plantar sensory stimulation
  • Stroke

ASJC Scopus subject areas

  • Clinical Neurology
  • Cardiology and Cardiovascular Medicine
  • Rehabilitation
  • Surgery

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