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pectoralis major muscle

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(redirected from greater pectoral muscle)

pec·to·ra·lis ma·jor mus·cle

(pek'tōr-āl'is mā'jŏr mŭs'ĕl)
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.
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