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HapPro: A Wearable Haptic Device for Proprioceptive Feedback.

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    IEEE Transactions on Bio-Medical Engineering
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    Summary

    A new wearable device, HapPro, effectively conveys prosthetic hand aperture information via touch. This noninvasive proprioceptive feedback improves prosthetic usability and user quality of life.

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    Area of Science:

    • Assistive robotics
    • Biomedical engineering
    • Human-computer interaction

    Background:

    • Myoelectric hand prostheses face high abandonment rates due to unintuitive control and lack of sensory feedback.
    • Proprioception, or the sense of hand aperture, is vital for everyday tasks but is often missing in prosthetic devices.
    • Closing the action-perception loop in prosthetics remains a significant challenge.

    Purpose of the Study:

    • Introduce HapPro, a wearable, noninvasive haptic device designed to provide proprioceptive feedback for prosthetic hands.
    • Evaluate the effectiveness of HapPro in conveying hand aperture information to users.
    • Assess the potential of HapPro to improve the usability of myoelectric prostheses.

    Main Methods:

    • Developed HapPro, a noninvasive haptic device mapping prosthetic hand aperture to a forearm-based tactile cue.
    • Utilized an under-actuated anthropomorphic robotic hand for testing.
    • Conducted tests with 43 able-bodied subjects and one amputee to quantify device effectiveness.

    Main Results:

    • HapPro demonstrated good accuracy in conveying hand aperture information.
    • Participants found the device intuitive and effective for receiving proprioceptive cues.
    • Proof-of-concept experiments with an amputee subject yielded similar positive results.

    Conclusions:

    • HapPro successfully conveys prosthetic hand aperture information noninvasively.
    • The device has the potential to enhance the usability of myoelectric prostheses.
    • Improved prosthetic feedback may reduce device abandonment and enhance users' quality of life.