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A biomimetic controller for a multifinger prosthesis.

R L Abboudi1, C A Glass, N A Newby

  • 1Department of Biomedical Engineering, Rutgers University, Piscataway, NJ 08854, USA.

IEEE Transactions on Rehabilitation Engineering : a Publication of the IEEE Engineering in Medicine and Biology Society
|July 3, 1999
PubMed
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A new controller for prosthetic hands uses pneumatic sensors to detect finger movements. This technology allows amputees to control individual finger motions and grasp actions with improved dexterity.

Area of Science:

  • Biomedical Engineering
  • Rehabilitation Technology
  • Prosthetics

Background:

  • Restoring dexterity in multifinger prostheses remains a challenge.
  • Existing control systems often lack precision for individual finger movements.

Purpose of the Study:

  • To develop and evaluate a novel controller for multifinger hand prostheses.
  • To assess the accuracy and performance of transducing volitional signals for individual phantom fingers.

Main Methods:

  • Developed pneumatic sensors from open-cell polymeric foam.
  • Interposed sensors between prosthetic socket and superficial extrinsic tendons.
  • Tested controller with three upper-limb amputees performing taps and grasps.

Main Results:

Related Experiment Videos

  • The TAP controller effectively produced voluntary finger flexions and grasping motions after brief training.
  • High sensitivity and specificity for tendon transduction (5-25 dB signal-to-noise ratio).
  • Demonstrated proportional force control and ability to perform sequential finger movements, including playing a simple piano piece.

Conclusions:

  • Noninvasive sensing of extrinsic tendons is feasible for restoring finger dexterity.
  • The developed controller shows promise for enhancing prosthetic hand functionality.
  • Further research can optimize sensor design and control algorithms for advanced prosthetic applications.