Pisiform Bone: The Small Yet Important Bone in Your Wrist Joint

Pisiform

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The pisiform is a small, pea-shaped bone located in the wrist on the ulnar (pinky finger) side of the hand. It is one of the eight carpal bones and is found within the wrist joint. The pisiform bone is unique in that it is a sesamoid bone, meaning it is developed within a tendon or ligament. In the case of the pisiform, it is found within the tendon of the flexor carpi ulnaris muscle, which is responsible for flexing the wrist and moving it towards the ulnar side of the forearm. The pisiform bone serves as a pulley to help the tendon move smoothly and efficiently.

Though small, the pisiform bone is important for proper function of the wrist and hand. Fractures of the pisiform bone can occur due to direct trauma or repeated stress to the bone, and can cause pain, swelling, and difficulty with wrist and hand movement. Treatment for pisiform fractures typically involves immobilization of the wrist and hand to allow for healing, and in severe cases, surgical intervention may be required.

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