Citation, DOI and article data
Hacking, C., Bell, D. Arm. Reference article, Radiopaedia.org. (accessed on 23 Sep 2021) https://radiopaedia.org/articles/41564
The arm (also known as the upper arm) is part of the upper limb below the pectoral girdle and above the forearm, comprising the humerus.
The elbow joint is inferior and the glenohumeral joint is superior. Arm flexion, extension, abduction, adduction, internal rotation and external rotation occur at the shoulder.
See humerus series for radiographic positioning.