Radius (bone) in the grooves on the lower end of the bone. The lateral surface ("facies lateralis; external surface") is convex throughout its entire extent and is known as the convexity of the radius, curving outwards to be convex at the side. Its upper third gives insertion to the supinator muscle. About its center is a rough ridge, for the insertion of the pronator teres muscle. Its lower part is narrow, and covered by the tendons of the abductor pollicis longus muscle and extensor pollicis brevis muscle. The upper extremity of the radius (or proximal extremity) presents a head, neck, and tuberosity.
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