Tags: Anatomical Structure, Muscle.
In human anatomy the deltoid muscle is the muscle forming the rounded contour of the shoulder. Anatomically it appears to be made up of three distinct sets of fibers though electromyography suggests that it consists of at least seven groups that can be independently coordinated by the central nervous system.It was previously called the deltoideus and the name is still used by some anatomists. It is called so because it is in the shape of the Greek letter Delta (triangle).
