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1 Cards in this Set
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Pectoralis Major
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O: Clavicular head- the medial
clavicle; sternocostal head- sternum, 1st-6th costal cartilages and aponeurosis of external abdominal oblique muscle. I: Lateral lip of intertubercular groove. N: Medial and lateral pectoral nerves. A: Acting together,both heads adduct and medially rotate humerus; acting alone, the clavicular head flexes glenohumeral joint; acting alone, the sternocostal head extends (the flexed) glenohumeral joint. |
