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Alterations in muscle activation patterns during robot-assisted bilateral training: A pilot study.

Bo Sheng1,2,3, Lihua Tang1, Shengquan Xie3,4

  • 11 Department of Mechanical Engineering, The University of Auckland, Auckland, New Zealand.

Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
|December 15, 2018
PubMed
Summary

Robot-assisted bilateral training impacts muscle activation during rehabilitation. Muscle activity decreases with robot assistance but increases with active force involvement, offering insights into stroke recovery.

Keywords:
Robot-assisted bilateral trainingadaptive admittance controllermuscle activation patternssurface electromyogram signalsvoluntary effort

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Area of Science:

  • Rehabilitation Engineering
  • Neurorehabilitation
  • Biomechanics

Background:

  • Robot-assisted bilateral training is an emerging rehabilitation strategy for stroke survivors.
  • Understanding muscle function during these synchronous movements is crucial for optimizing therapy.
  • Current knowledge on muscle activation patterns and voluntary effort in robot-assisted bilateral training remains limited.

Purpose of the Study:

  • To investigate muscle activation patterns during robot-assisted bilateral training.
  • To assess voluntary effort during various robot-assisted bilateral training protocols.
  • To analyze the influence of different training parameters on muscle function.

Main Methods:

  • 10 healthy participants engaged in a 60-minute experiment.
  • Two distinct bilateral exercises, each with four training protocols, were performed.
  • Robot trajectories, interaction forces, and surface electromyogram (sEMG) signals were systematically recorded.

Main Results:

  • Robot-assisted training significantly alters muscle activation patterns, with effects varying by protocol.
  • Muscle activity was reduced during standard robot-assisted training but increased during active force-involved training.
  • High correlation observed in muscle activations between corresponding muscle groups in the left and right arms.

Conclusions:

  • Robot-assisted bilateral training protocols influence muscle activation and voluntary effort.
  • Findings provide a foundation for future clinical trials to assess therapeutic efficacy in stroke patients.
  • This research contributes to a deeper understanding of bilateral motor recovery processes post-stroke.