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Related Experiment Videos

[Functional anatomy of the pisiform bone].

M Laude, D Le Gars, G Boudin

    Bulletin De L'Association Des Anatomistes
    |December 1, 1979
    PubMed
    Summary

    The pisiform bone in the carpal canal moves during a power grip, essential for hand prehension. The pisohamate ligament stabilizes this crucial pisiform movement.

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    Area of Science:

    • Anatomy
    • Biomechanics
    • Kinesiology

    Context:

    • The carpal canal (canalis carpi) is a complex anatomical structure in the wrist.
    • The pisiform bone is a unique sesamoid bone within the wrist's anatomy.
    • Understanding carpal bone dynamics is crucial for hand function.

    Purpose:

    • To investigate the biomechanical role of the pisiform bone within the carpal canal.
    • To analyze the movement of the pisiform during a power grip.
    • To elucidate the stabilizing function of the pisohamate ligament.

    Summary:

    • The pisiform is the sole mobile element within the carpal canal.
    • During a power grip, the pisiform exhibits posterior and medial displacement.
    • This movement is critically dependent on the integrity of the pisohamate ligament, which counteracts the forces exerted by the flexor carpi ulnaris.

    Impact:

    • Highlights the pisiform's dynamic contribution to hand strength and dexterity.
    • Underscores the importance of the pisohamate ligament in maintaining carpal stability.
    • Provides insights into potential mechanisms of wrist injury and dysfunction.

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