The triquetrum is a small, triangular bone located in the wrist, specifically in the proximal row of the carpal bones. It is situated on the ulnar side, between the pisiform and the lunate bones. The triquetrum plays a crucial role in wrist movement and stability, allowing for a range of motions in the hand. This bone is also known as the triquetral bone and is one of eight carpal bones that make up the wrist. It articulates with several other bones, including the scaphoid and the hamate, contributing to the complex structure of the wrist joint.