Pisiform joint

Pisiform Joint

The Pisiform Joint is a small, pea-shaped carpal bone found in the human hand. It is situated where the ulna, the larger bone of the forearm, meets the smallest finger side of the wrist. The Pisiform Joint is unique among the carpal bones as it is situated on the anterior, or palmar, side of the carpal bone structure.

Etymology

The term "Pisiform" is derived from the Latin word 'pisum' which means 'pea'. This is due to the small, pea-like shape of the bone.

Anatomy

The Pisiform Joint is a sesamoid bone within the tendon of the Flexor Carpi Ulnaris muscle. It articulates only with the triquetral, which is another carpal bone. The Pisiform Joint is palpable in the distal part of the ulnar border of the palm.

Function

The Pisiform Joint serves as a support structure for the tendons that control finger and wrist movement. It also provides protection for the ulnar nerve, one of the three main nerves in the arm.

Clinical Significance

Injury or disease affecting the Pisiform Joint can lead to conditions such as Pisiform Bone Syndrome or Pisiform Fracture. These conditions can cause pain, swelling, and limited movement in the wrist and hand.

Related Terms

• Carpal Bones
• Flexor Carpi Ulnaris
• Triquetral bone
• Ulnar Nerve
• Pisiform Bone Syndrome
• Pisiform Fracture

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