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Development of the Limb Synovial Joints01:07

Development of the Limb Synovial Joints

Joints form during embryonic development in conjunction with the formation and growth of the associated bones. The embryonic tissue that gives rise to all bones, cartilage, and connective tissues of the body is called mesenchyme.
The mesenchymal stem cells differentiate into chondrocytes that form the hyaline cartilage, and later the cartilaginous model of the bone. This model further transforms into a bone. This process is known as endochondral ossification.
During development, the limbs...

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A Structured Rehabilitation Protocol for Improved Multifunctional Prosthetic Control: A Case Study
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A Data-Driven Design Framework for Structural Optimization to Enhance Wearing Adaptability of Prosthetic Hands.

Yu Gu, Long He, Haozhou Zeng

    IEEE Transactions on Neural Systems and Rehabilitation Engineering : a Publication of the IEEE Engineering in Medicine and Biology Society
    |July 17, 2024
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    This study introduces a data-driven design framework (D3Frame) to optimize prosthetic hand socket design. The framework improves socket adaptability for amputees, reducing discomfort and enhancing device usability.

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    Area of Science:

    • Biomedical Engineering
    • Rehabilitation Engineering
    • Prosthetics and Orthotics

    Background:

    • Prosthetic hand incompatibility causes secondary injuries and high abandonment rates.
    • Optimizing prosthetic socket fit is crucial for amputee quality of life.
    • Existing methods lack data-driven optimization for residual limb anatomy.

    Purpose of the Study:

    • To introduce a data-driven design framework (D3Frame) for prosthetic socket optimization.
    • To enhance prosthetic socket adaptability and reduce secondary injuries in amputees.
    • To improve the overall functionality and user acceptance of prosthetic hands.

    Main Methods:

    • Developed a multi-index optimization framework (D3Frame) incorporating motion, pressure, and clinical data.
    • Applied D3Frame to optimize specific regions of prosthetic sockets: Antecubital Channel (AC), Lateral Epicondylar Region Contour (LC), Medial Epicondylar Region Contour (MC), Olecranon Region Contour (OC), Lateral Flexor/ Extensor Region (LR), and Medial Flexor/ Extensor Region (MR).
    • Conducted experiments with five forearm amputees to evaluate socket adaptability and muscle fatigue under varying load conditions.

    Main Results:

    • The optimized socket demonstrated improved adaptability compared to traditional sockets.
    • Experimental results showed modest improvements on clinical scales and significant reductions in muscle fatigue.
    • Muscle effort decreased by 19%, slope values of mean/median frequency decreased by 70% and 99%, and mean/median frequency in the motion cycle increased by approximately 5%.

    Conclusions:

    • The D3Frame offers a data-driven approach to optimize prosthetic socket design.
    • This framework has the potential to aid prosthetists in creating more adaptable and comfortable prosthetic devices.
    • Improved socket adaptability can lead to reduced prosthesis abandonment and enhanced amputee quality of life.