Hamulus ossis hamati, also known as the hook of the hamate bone, is a structure found in the wrist of humans and some other vertebrates. It is an anatomical term that refers to a small, hook-shaped process located on the palm side of the hamate bone, which is one of the eight carpal bones of the wrist.
The hamate bone is situated on the distal row of carpal bones, positioned towards the ulnar side of the wrist. The hamulus ossis hamati is present at the distal end of this bone and extends anteriorly, forming a hook-like projection. This hook serves as an attachment point for various ligaments and tendons that pass through the wrist joint.
Its main significance lies in its role in forming the floor of the carpal tunnel, a narrow passageway located within the wrist. The carpal tunnel contains several tendons and the median nerve, which provides sensation to the thumb, index, middle, and ring fingers. The hook of the hamate bone acts as an anchor for the transverse carpal ligament, which forms the roof of the carpal tunnel.
Injuries or abnormalities involving the hamulus ossis hamati can lead to various symptoms, such as pain, weakness, or numbness in the hand and fingers. Fractures or dislocations of the hamate bone, particularly those affecting the hook, may require medical intervention, such as immobilization, surgical repair, or removal of the hook.
