Electrical stimulation and iterative learning control for functional recovery in the upper limb post-stroke

Katie Meadmore, Timothy Exell, Christopher Freeman, Mustafa Kutlu, Eric Rogers, Ann Marie Hughes, Emma Hallewell, Jane Burridge

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Therapies using functional electrical stimulation (FES) in conjunction with practice of everyday tasks have proven effective in facilitating recovery of upper limb function following stroke. The aim of the current study is to develop a multi-channel electrical stimulation system that precisely controls the assistance provided in goal-orientated tasks through use of advanced model-based 'iterative learning control' (ILC) algorithms to facilitate functional motor recovery of the upper limb post-stroke. FES was applied to three muscle groups in the upper limb (the anterior deltoid, triceps and wrist extensors) to assist hemiparetic, chronic stroke participants to perform a series of functional tasks with real objects, including closing a drawer, turning on a light switch and repositioning an object. Position data from the participants' impaired upper limb was collected using a Microsoft Kinect® and was compared to an ideal reference. ILC used data from previous attempts at the task to moderate the FES signals applied to each muscle group on a trial by trial basis to reduce performance error whilst supporting voluntary effort by the participant. The clinical trial is on-going. Preliminary results show improvements in performance accuracy for each muscle group, as well as improvements in clinical outcome measures pre and post 18 training sessions. Thus, the feasibility of applying precisely controlled FES to three muscle groups in the upper limb to facilitate functional reach and grasp movements post stroke has been demonstrated.

Original languageEnglish
Title of host publicationIEEE International Conference on Rehabilitation Robotics
PublisherIEEE
ISBN (Print)9781467360241
DOIs
Publication statusPublished - 2013
Externally publishedYes
EventIEEE 13th International Conference on Rehabilitation Robotics - Seattle, WA, United States
Duration: 24 Jun 201326 Jun 2013

Publication series

Name2013 IEEE International Conference on Rehabilitation Robotics (ICORR)
PublisherIEEE
ISSN (Print)1945-7898

Conference

ConferenceIEEE 13th International Conference on Rehabilitation Robotics
Abbreviated titleICORR 2013
CountryUnited States
CitySeattle, WA
Period24/06/1326/06/13

Keywords

  • Functional electrical stimulation
  • Iterative learning control
  • Stroke rehabilitation
  • Technology
  • Upper limb
  • Wrist

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