Artificial sensory feedback can be used to convey information about the state of a myoelectric prosthesis to its user, potentially facilitating control and improving user experience. In this study, we tested four different methods to encode wrist flexion and extension angles into vibration stimulation profiles. Fifteen able-bodied participants used a keyboard to control a virtual hand to reach the target angle, while the feedback about the angle was conveyed using only 4 vibration motors. The outcome measures were the deviation from the target position and the time efficiency. There was no significant difference between the encoding methods, but the approach where the sensation moved from the dorsal to the volar side of the forearm showed a slight trend and favorable user preference. This work is an important step towards implementing artificial proprioceptive feedback about wrist flexion and extension, which when combined with the other recently presented approaches, can lead to a feedback system that can convey a complete state of the prosthesis.

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Artificial Proprioceptive Feedback of Wrist Flexion and Extension for Myoelectric Prostheses

  • Strahinja Dosen,
  • Nicolò Boccardo,
  • Matteo Laffranchi,
  • Andrea Marinelli

摘要

Artificial sensory feedback can be used to convey information about the state of a myoelectric prosthesis to its user, potentially facilitating control and improving user experience. In this study, we tested four different methods to encode wrist flexion and extension angles into vibration stimulation profiles. Fifteen able-bodied participants used a keyboard to control a virtual hand to reach the target angle, while the feedback about the angle was conveyed using only 4 vibration motors. The outcome measures were the deviation from the target position and the time efficiency. There was no significant difference between the encoding methods, but the approach where the sensation moved from the dorsal to the volar side of the forearm showed a slight trend and favorable user preference. This work is an important step towards implementing artificial proprioceptive feedback about wrist flexion and extension, which when combined with the other recently presented approaches, can lead to a feedback system that can convey a complete state of the prosthesis.