Pisiform bone Pisiform bone The pisiform bone ( or ), also spelled pisiforme (from the Latin "pisifomis", pea-shaped), is a small knobbly, sesamoid bone that is found in the wrist. It forms the ulnar border of the carpal tunnel. The pisiform is a sesamoid bone, with no covering membrane of periosteum. It is the last carpal bone to ossify. The pisiform bone is a small bone found in the proximal row of the wrist (carpus). It is situated where the ulna joins the wrist, within the tendon of the flexor carpi ulnaris muscle. It only has one side that acts as a
Bertram A. Bone solving the many problems which confronted him." During the Japanese Attack on Pearl Harbor on December 7, 1941, Bone was stationed on Hawaii and coordinated the trucks with ammunition. In May 1942, Bone was transferred to the staff of South Pacific Island Base Inspection Board under Rear Admiral Richard E. Byrd and travelled to the South Pacific Area as a member of the inspecting party. He was promoted to the rank of colonel on July 24, 1942. During September of that year, Bone was transferred to Washington, D.C. and appointed Chief of the Gunnery Section, Division of Plans and Policies