Superficial thoracoappendicular muscle of chest;
origin, clavicular part (pars clavicularis), medial half of clavicle; sternocostal part [TA] (pars sternocostalis), anterior surface of manubrium and body of sternum and cartilages of first to sixth ribs; abdominal part [TA] (pars abdominalis [TA]), aponeurosis of external oblique;
insertion, crest of greater tubercle of humerus;
action, adducts and medially rotates arm;
nerve supply, anterior thoracic.
Synonym(s):
greater pectoral muscle,
musculus pectoralis major.