This photograph shows the arm bones at the point of articulation (the joint area) between the bone of the upper arm (humerus) and the two bones of the lower arm (radius and ulna).
Review Date 8/15/2018
Updated by: C. Benjamin Ma, MD, Professor, Chief, Sports Medicine and Shoulder Service, UCSF Department of Orthopaedic Surgery, San Francisco, CA. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.