pectoral muscles

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pectoralis major: action

flexes shoulder, medially rotates shoulder, and adducts shoulder

pectoralis major: insertion

intertubercular groove of humerus

pectoralis major: nerve supply

medial and lateral pectoral *

pectoralis minor: origin

ribs 3-5

pectoralis minor: action

depresses scapula, elevates ribs

pectoralis major: origin

clavicle, sternum, costal cartilage of ribs 1-6

pectoralis minor: insertion

coracoid process of scapula

pectoralis minor: nerve supply

medial pectoral *


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