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| - PECTORALIS MAJOR
- | | ORIGIN: |
Clavicular head-medial half clavicle. Sternocostal head-lateral manubrium and sternum, six upper costal cartilages and external oblique aponeurosis | | INSERTION: | Lateral lip of bicipital groove of humerus and anterior lip of deltoid tuberosity
| | ACTION: |
Clavicular head:flexes and adducts arm. Sternal head: adducts and medially rotates arm . Accessory for inspiration
| | NERVE: |
Medial pectoral nerve (from medial cord) and lateral pectoral nerve (from lateral cord) (C6, 7, 8)
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