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Updated: Jan 9, 2026

A Structured Rehabilitation Protocol for Improved Multifunctional Prosthetic Control: A Case Study
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From Grasping to Manipulation: Kinematic Synergy Analysis for Advanced Prosthetics.

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    Summary

    This study reveals 7 dominant hand synergies for manipulation, requiring more joint independence than grasping. Key joints include the proximal interphalangeal (PIP) joints for dexterous tasks.

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    Area of Science:

    • Biomechanics
    • Human Movement Science
    • Robotics

    Background:

    • Hand synergies are fundamental to motor control.
    • Understanding manipulation synergies is crucial for advanced prosthetics.

    Purpose of the Study:

    • To identify dominant geometric hand synergies during manipulation.
    • To contrast manipulation synergies with grasping movements.
    • To determine key joints involved in dexterous hand tasks.

    Main Methods:

    • Recorded hand movements using an 18-Degrees of Freedom (DoF) Dataglove.
    • Applied Principal Component Analysis (PCA) to identify synergies.
    • Utilized k-means clustering for cross-subject synergy comparison.

    Main Results:

    • Identified 7 dominant synergies characterizing manipulation tasks.
    • Found greater joint independence needed for manipulation compared to grasping.
    • Highlighted significant contributions from proximal interphalangeal (PIP) joints.

    Conclusions:

    • Manipulation relies on distinct, dominant synergies.
    • PIP joints are critical for dexterous manipulation.
    • Findings inform the design of next-generation bionic limbs.