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Deltoid muscle

The deltoid muscle is the triangular muscle that covers the upper arm and shoulder joint. It moves the upper arm forward, backward, to the side, and away from the body.

By Healthwise Staff
Primary Medical Reviewer William M. Green, MD - Emergency Medicine
Specialist Medical Reviewer Kenneth J. Koval, MD - Orthopedic Surgery, Orthopedic Trauma
Specialist Medical Reviewer Patrick J. McMahon, MD - Orthopedic Surgery
Last Revised July 15, 2009

WebMD Medical Reference from Healthwise

Last Updated: July 15, 2009
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