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Origin
- medial half clavicle
- sternum
- upper 6 costal cartilages
Insertion
- lateral lip of bicipital groove of humerus
Nerve Supply
- medial pectoral nerve from medial cord brachial plexus
- lateral pectoral nerve from lateral cord brachial plexus
Action
- Adducts arm
- medial rotation
- flex arm
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