Deltoid muscle

muscle of the upper limb
The deltoid muscle

The deltoid muscle is the muscle forming the rounded contour of the human shoulder. Electromyography suggests that it is at least seven groups that can be independently coordinated by the central nervous system.[1]


  1. Brown J.M. et al 2007. Muscles within muscles: coordination of 19 muscle segments within three shoulder muscles during isometric motor tasks. J Electromyogr Kinesiol. 17(1):57-73. PMID 16458022 doi:10.1016/j.jelekin.2005.10.007