pectoralis major (muscle)

(redirected from clavicular head of pectoralis major muscle)

pec·to·ra·lis ma·jor (mus·cle)

[TA]
superficial thoracoappendicular muscle of chest; origin, clavicular part [TA] (pars clavicularis [TA]), medial half of clavicle; sternocostal part [TA] (pars sternocostalis [TA]), 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.