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An Objective Functional Evaluation of Myoelectrically-Controlled Hand Prostheses: A Pilot Study Using the Virtual Peg

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    The Virtual Peg Insertion Test (VPIT) offers an objective method for assessing upper limb prosthesis function. This pilot study shows VPIT can differentiate between prosthetic devices and identify performance variations.

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    Area of Science:

    • Rehabilitation Engineering
    • Prosthetics and Orthotics
    • Human Movement Science

    Background:

    • Current upper limb prostheses assessments are often subjective and lack sensitivity for detailed evaluation.
    • Objective and sensitive methods are needed to compare prosthesis quality and optimize control settings.

    Purpose of the Study:

    • To explore the feasibility of the Virtual Peg Insertion Test (VPIT) for in-depth assessment of myoelectric upper limb prostheses.
    • To evaluate VPIT's ability to provide objective functional performance measures.

    Main Methods:

    • A single transradial amputee participant performed the VPIT goal-directed manipulation task.
    • The participant used their sound limb and four different myoelectric prostheses.
    • Kinematic and kinetic data were collected and analyzed.

    Main Results:

    • The VPIT protocol was successfully completed with two of four advanced prostheses.
    • Objective VPIT measures revealed differences between the sound and amputated sides.
    • Varying movement patterns were identified across different prostheses and control settings.
    • Outcome measures correlated with subjectively perceived prosthesis quality.

    Conclusions:

    • The Virtual Peg Insertion Test (VPIT) is feasible for objectively evaluating functional upper limb prosthesis usage.
    • VPIT provides sensitive, objective measures for prosthesis assessment and control optimization.