| Muscle | Origin | Insertion | Innervation | Action |
|---|---|---|---|---|
| Pectoralis major | Clavicle (medial half) Sternum Costal cartilages 1-6 Rectus sheath (anterior layer) |
Humerus (crest of greater tubercle) | Lateral pectoral n. Medial pectoral n. C5 - T1 |
Entire muscle: Adduction, IR Clavicular & Sternocostal parts: Flexion, Aids in respiration when shoulder is fixed |
| Pectoralis minor | 3-5 ribs | Coracoid process | Medial pectoral n. C8 - T1 |
Scapula: Depression, Downward rotation, Protraction Respiration: Assists in respiration |
Medial Pectoral nerve
Motor Innervation
Citation
For attribution, please cite this work as:
Yomogida N, Kerstein C. Medial Pectoral nerve.
https://yomokerst.com/The
Archive/Anatomy/Nerves/Upper extremity
nerves/medial_pectoral_nerve.html