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[Functional anatomy of the pisiform bone].
Bulletin De L'Association Des Anatomistes
|December 1, 1979
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.
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.