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A comparison between control methods for implanted FES hand-grasp systems

R L Hart1, K L Kilgore, P H Peckham

  • 1Case Western Reserve University, Cleveland VA Medical Center, MetroHealth Medical Center, OH 44109, USA.

IEEE Transactions on Rehabilitation Engineering : a Publication of the IEEE Engineering in Medicine and Biology Society
|June 19, 1998
PubMed
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Functional electrical stimulation (FES) neuroprostheses improve grasp and release for tetraplegia. Three control methods showed similar performance, highlighting personalized FES system selection for optimal patient outcomes.

Area of Science:

  • Biomedical Engineering
  • Neuroscience
  • Rehabilitation Technology

Background:

  • Individuals with tetraplegia often experience loss of hand function.
  • Neuroprostheses using functional electrical stimulation (FES) offer a potential solution for restoring grasp and release.
  • Effective control strategies are crucial for user independence.

Purpose of the Study:

  • To compare three distinct control methods for FES-driven hand prostheses.
  • To evaluate the performance of FES hand control in individuals with tetraplegia.
  • To identify factors influencing the choice of FES control strategy.

Main Methods:

  • Three control methods were evaluated: shoulder position, wrist position, and wrist extensor myoelectric activity.
  • Experienced neuroprosthesis users performed a grasp release test (GRT) with each FES control method.

Related Experiment Videos

  • Performance was compared against tenodesis without FES.

    • Main Results:

    • All three FES control methods demonstrated significant improvement over tenodesis without FES.
    • No significant difference in overall performance was observed among the three FES control methods.
    • Each control method presented unique advantages and disadvantages influenced by patient-specific factors.

    Conclusions:

    • FES neuroprostheses effectively restore grasp and release function in tetraplegia.
    • The optimal FES control method is patient-dependent, considering factors like injury level and physical capabilities.
    • Offering multiple control options allows for personalized FES system adaptation to individual needs and preferences.