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3 Cards in this Set
- Front
- Back
Pectoralis Major – Front chest muscles over ribs
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Origin: clavicle, sternum, costal cartilages 1-6
Insertion: crest inferior to greatest tubercle Innervation: lateral AND medial pectoral nn. Action: adduct + medially rotate humerus |
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Pectoralis Minor – Left smaller muscle over upper ribs
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Origin: ribs 3-5
Insertion: coracoid process Innervation: lateral and medial pectoral nn. Action: protract shoulder girdle + depress glenoid |
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Subclavius – small muscle covering the top rib
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Origin: 1st rib
Insertion: inferior clavicle Innervation: n. to subclavius Action: protract shoulder girdle |