Concurrent ankle-assisted movement, biofeedback, and proprioceptive stimulation reduces lower limb motor impairment and improves gait in persons with stroke

Gonzalo Varas-Diaz, Tanvi Bhatt, Barry Oken, Elliot Roth, John Hayes, Paul Cordo

Research output: Contribution to journalArticlepeer-review

Abstract

Background: Persons with stroke live with residual sensorimotor impairments in their lower limbs (LL), which affects their gait. Purpose: We investigated whether these residual impairments and resulting gait deficits can be reduced through concurrently applied assisted movement, biofeedback, and proprioceptive stimulation. Methods: A robotic device provided impairment-oriented training to the affected LL of 24 persons with stroke (PwS) with moderate-to-severe LL impairment. Participants were given 22–30 training sessions over 2–3 months. During training, the interventional device cyclically dorsiflexed and plantarflexed the ankle at 5 deg/s through ±15 deg for 30 min while the participant assisted with the imposed movement. Concurrently, participants received visual biofeedback of assistive joint torque or agonist EMG while mechanical vibration was applied to the currently lengthening (i.e. antagonist) tendon. Results: Sensorimotor impairment significantly decreased over the training period, which was sustained over 3 months, based on the Fugl-Meyer Assessment (FMA-LL) (p < .001), modified Ashworth scale in dorsiflexors (p < .05), and an ankle strength test (dorsiflexors and plantarflexors) (p < .05). Balance and gait also improved, based on the Tinetti Performance Oriented Mobility Assessment (POMA) (p < .05). Conclusion: Impairment-oriented training using a robotic device capable of applying assisted movement, biofeedback, and proprioceptive stimulation significantly reduces LL impairment and improves gait in moderately-to-severely impaired PwS.

Original languageEnglish (US)
Pages (from-to)477-486
Number of pages10
JournalPhysiotherapy Theory and Practice
Volume40
Issue number3
DOIs
StatePublished - 2024

Keywords

  • assisted movement
  • biofeedback
  • impairment-oriented training
  • proprioceptive stimulation
  • robotics
  • stroke rehabilitation

ASJC Scopus subject areas

  • Physical Therapy, Sports Therapy and Rehabilitation

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