Fifth metacarpal bone Fifth metacarpal bone The fifth metacarpal bone (metacarpal bone of the little finger or pinky finger) is the most medial and second-shortest of the metacarpal bones. It presents on its base one facet on its superior surface, which is concavo-convex and articulates with the hamate, and one on its radial side, which articulates with the fourth metacarpal. On its ulnar side is a prominent tubercle for the insertion of the tendon of the extensor carpi ulnaris muscle. The dorsal surface of the body is divided by an oblique ridge, which extends from near the ulnar side of the base to
Bertram A. Bone capacity, he was responsible for the recruit training of all new marines on the West Coast of the United States. When Marine Corps Base San Diego was redesignated Marine Corps Recruit Depot in January 1948, Bone was appointed assistant chief of staff for operations and training. He served in this capacity until his retirement on June 30, 1949. Bone was advanced to the rank of brigadier general for having been specially commended in combat. He settled in his native San Diego and died on October 22, 1961. Bone is buried at Fort Sam Houston National Cemetery together with his wife,