Pectoralis Major

From WikiLectures

English: Pectoralis major muscle
Latin: Musculus pectoralis major

Pectoralis major muscle

Pectoralis major muscle (lat. musculus pectoralis major) is a muscle on the anterior part of the chest.

It arises from the anterior surface of the sternal part of the clavicle (pars clavicularis), from the sternum (pars sternalis) and from the cartilages of the true ribs (pars abdominalis).
The muscle is inserted into the greater tubercle of the humerus.
lateral (C8, Th1) and medial (C5–C7) pectoral nerves (plexus brachialis).
  • flexion of humerus;
  • horizontal adduction;
  • inward rotation;
  • secondary inspiratory muscle.
  • Pulling the humerus towards the midline of the body anteriorly.

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Sources[edit | edit source]

Wikiskripta. Musculus pectoralis major [online]. Wikiskripta, ©2011. The last revision 2011-06-13, [cit. 2011-07-19]. <>.