Dexterous control of a prosthetic hand using fine-wire intramuscular electrodes in targeted extrinsic muscles

Christian Cipriani, Jacob L. Segil, J. Alex Birdwell, Richard F. Weir

Research output: Contribution to journalArticle

50 Scopus citations

Abstract

Restoring dexterous motor function equivalent to that of the human hand after amputation is one of the major goals in rehabilitation engineering. To achieve this requires the implementation of a effortless human-machine interface that bridges the artificial hand to the sources of volition. Attempts to tap into the neural signals and to use them as control inputs for neuroprostheses range in invasiveness and hierarchical location in the neuromuscular system. Nevertheless today, the primary clinically viable control technique is the electromyogram measured peripherally by surface electrodes. This approach is neither physiologically appropriate nor dexterous because arbitrary finger movements or hand postures cannot be obtained. Here we demonstrate the feasibility of achieving real-time, continuous and simultaneous control of a multi-digit prosthesis directly from forearm muscles signals using intramuscular electrodes on healthy subjects. Subjects contracted physiologically appropriate muscles to control four degrees of freedom of the fingers of a physical robotic hand independently. Subjects described the control as intuitive and showed the ability to drive the hand into 12 postures without explicit training. This is the first study in which peripheral neural correlates were processed in real-time and used to control multiple digits of a physical hand simultaneously in an intuitive and direct way.

Original languageEnglish (US)
Article number6718168
Pages (from-to)828-836
Number of pages9
JournalIEEE Transactions on Neural Systems and Rehabilitation Engineering
Volume22
Issue number4
DOIs
StatePublished - Jul 2014

Keywords

  • Artificial limbs
  • fine-wire electrodes
  • myoelectric control
  • neuroprosthetics

ASJC Scopus subject areas

  • Internal Medicine
  • Neuroscience(all)
  • Biomedical Engineering

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