Triquetral
Triquetral
The Triquetral (pronounced: tri-KWET-ral), also known as the Triquetrum (pronounced: tri-KWET-rum), is one of the eight small bones in the wrist known as the carpal bones. It is located on the ulnar side of the hand (the side of the little finger), and articulates with four bones: the lunate, the pisiform, the hamate, and the ulna.
Etymology
The term "Triquetral" comes from the Latin word "Triquetrus" which means "three-cornered". This is in reference to the bone's pyramidal shape.
Anatomy
The Triquetral is pyramid-shaped and has three surfaces: proximal, distal, and dorsal. The proximal surface articulates with the lunate bone, the distal surface articulates with the hamate bone, and the dorsal surface articulates with the pisiform bone.
Clinical Significance
Injuries to the Triquetral are relatively rare but can occur as a result of a fall onto an outstretched hand. The most common injury is a Triquetral fracture, which can cause pain, swelling, and limited wrist motion. Treatment typically involves immobilization with a cast or splint, but surgery may be required in severe cases.
Related Terms
External links
- Medical encyclopedia article on Triquetral
- Wikipedia's article - Triquetral
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