Deltoid muscle
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The deltoid muscle is the muscle forming the rounded contour of the human shoulder. It is also known as the 'common shoulder muscle', particularly in other animals such as the domestic cat. Anatomical
Origin and insertion of deltoid muscle
Deltoid muscle with superior limb in abduction
Pectoralis major
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The pectoralis major is a thick, fan-shaped or triangular convergent muscle of the human chest. It makes up the bulk of the chest muscles and lies under the breast. Beneath the pectoralis major is the
Deltoid muscle
…from most of the anterior border and upper surface of the lateral third of the clavicle. The anterior origin lies adjacent to the lateral fibers of the pectoralis major muscle as do the end tendons of both muscles. These muscle fibers are closely related and only a small chiasmatic space, through which the cephalic…
Activation and protection of the Pectoralis major by a gymnast using talc.
Pectoralis major muscle