Muscles / Chest
Pectoralis major (sternocostal head)
- Chest
- Shoulder & scapula
- Superficial layer
Part of Pectoralis major.
Anatomy
- Origin
- Anterior surface of the sternum, upper six costal cartilages, aponeurosis of the external oblique
- Insertion
- Lateral lip of the intertubercular sulcus of the humerus
- Nerve
- Lateral and medial pectoral nerves (C7-T1)
Actions
- Extends the humerus from a flexed position
- Adducts and medially rotates the humerus
Exercises that train it most
References (4)
- Standring S, ed. Elsevier. Gray's Anatomy: The Anatomical Basis of Clinical Practice. 42nd ed.
- Dalley AF, Agur AMR. Wolters Kluwer. Moore's Clinically Oriented Anatomy. 9th ed.
- Neumann DA. Elsevier. Kinesiology of the Musculoskeletal System: Foundations for Rehabilitation. 3rd ed.
- Betts JG, Young KA, Wise JA, et al. OpenStax (free, openly licensed textbook). Anatomy and Physiology 2e