Evaluation of EMG pattern recognition for upper limb prosthesis control: a case study in comparison with direct myoelectric control Public Deposited

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Creator
  • Wolk, Nancy
    • Affiliation: School of Medicine, UNC/NCSU Joint Department of Biomedical Engineering
    • Other Affiliation: Rex Hospital, Raleigh, USA
  • Winslow, Anna
    • Affiliation: School of Medicine, UNC/NCSU Joint Department of Biomedical Engineering
  • Huang, Helen
    • Affiliation: School of Medicine, UNC/NCSU Joint Department of Biomedical Engineering
    • Other Affiliation: Closed-Loop Engineering for Advanced Engineering (CLEAR) Core, North Carolina State University, Raleigh, USA
  • Crouch, Dustin L
    • Affiliation: School of Medicine, UNC/NCSU Joint Department of Biomedical Engineering
    • Other Affiliation: Department of Mechanical, Aerospace, and Biomedical Engineering, University of Tennessee, Knoxville, USA
  • Zhang, Fan
    • Affiliation: School of Medicine, UNC/NCSU Joint Department of Biomedical Engineering
  • Resnik, Linda
    • Other Affiliation: Health Services, Policy and Practice, School of Public Health, Brown University, Providence, USA; Providence VA Medical Center, Providence, USA
Abstract
  • Abstract Background Although electromyogram (EMG) pattern recognition (PR) for multifunctional upper limb prosthesis control has been reported for decades, the clinical benefits have rarely been examined. The study purposes were to: 1) compare self-report and performance outcomes of a transradial amputee immediately after training and one week after training of direct myoelectric control and EMG pattern recognition (PR) for a two-degree-of-freedom (DOF) prosthesis, and 2) examine the change in outcomes one week after pattern recognition training and the rate of skill acquisition in two subjects with transradial amputations. Methods In this cross-over study, participants were randomized to receive either PR control or direct control (DC) training of a 2 DOF myoelectric prosthesis first. Participants were 2 persons with traumatic transradial (TR) amputations who were 1 DOF myoelectric users. Outcomes, including measures of dexterity with and without cognitive load, activity performance, self-reported function, and prosthetic satisfaction were administered immediately and 1 week after training. Speed of skill acquisition was assessed hourly. One subject completed training under both PR control and DC conditions. Both subjects completed PR training and testing. Outcomes of test metrics were analyzed descriptively. Results Comparison of the two control strategies in one subject who completed training in both conditions showed better scores in 2 (18%) dexterity measures, 1 (50%) dexterity measure with cognitive load, and 1 (50%) self-report functional measure using DC, as compared to PR. Scores of all other metrics were comparable. Both subjects showed decline in dexterity after training. Findings related to rate of skill acquisition varied considerably by subject. Conclusions Outcomes of PR and DC for operating a 2-DOF prosthesis in a single subject cross-over study were similar for 74% of metrics, and favored DC in 26% of metrics. The two subjects who completed PR training showed decline in dexterity one week after training ended. Findings related to rate of skill acquisition varied considerably by subject. This study, despite its small sample size, highlights a need for additional research quantifying the functional and clinical benefits of PR control for upper limb prostheses.
Date of publication
Identifier
  • doi:10.1186/s12984-018-0361-3
Resource type
  • Article
Rights statement
  • In Copyright
Rights holder
  • The Author(s).
Language
  • English
Bibliographic citation
  • Journal of NeuroEngineering and Rehabilitation. 2018 Mar 15;15(1):23
Publisher
  • BioMed Central
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