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Force and Position Control in Humans - The Role of Augmented Feedback
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Does Trans-radial Longitudinal Compression Influence Myoelectric Control?

J Olsen1, S Day2, S Dupan3

  • 1Intelligent Sensing Laboratory, School of Engineering, Newcastle University, UK.

Canadian Prosthetics & Orthotics Journal
|August 24, 2023
PubMed
Summary
This summary is machine-generated.

Longitudinal compression sockets do not affect single-channel myoelectric control or fatigue. However, they may enhance multi-channel EMG control by maintaining consistent pressure during muscle contractions.

Keywords:
AmputationCompressionCompression-ReleaseControlEMGFatigueMyoelectricProstheticSocketTrans-RadialUpper-Limb

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Area of Science:

  • Biomedical Engineering
  • Prosthetics and Orthotics
  • Rehabilitation Technology

Background:

  • Current trans-radial prosthetic sockets are not optimized for myoelectric control.
  • Improved socket designs, like longitudinal compression sockets, offer enhanced biomechanical stability.
  • The impact of limb stabilization on myoelectric control remains under-investigated.

Purpose of the Study:

  • To evaluate the effect of longitudinal compression socket configurations on myoelectric control.
  • To assess the influence of compression on muscle pressure and fatigue during prosthetic use.

Main Methods:

  • Twelve able-bodied participants tested a longitudinal compression socket simulator in compressed, relief, and uncompressed states.
  • Participants performed single-channel myoelectric target tracking and high-intensity grasping tasks.
  • Evaluated tracking accuracy, pressure distribution, and limb fatigue rates across configurations.

Main Results:

  • No significant differences in tracking accuracy or fatigue rates were found between compression configurations.
  • The compressed configuration successfully maintained pressure on opposing sides of the socket during muscle contractions.

Conclusions:

  • Longitudinal compression does not impede single-channel EMG control or improve fatigue resistance.
  • Longitudinal compression sockets show promise for enhancing multi-channel EMG control reliability by ensuring consistent pressure during muscle activation.