Pectoralis major muscleEe Froze: i7h I.Po2.P T1U tJj
| Pectoralis major | |
|---|---|
 Superficial muscles o the chest an front o the airm. | |
 The trunk viewed frae the front, shawin the pectoralis major tae the richt. (Tae the left it is remuived shawin unnerlyin structures, amang ither the pectoralis minor.) | |
| Details | |
| Origin |
Clavicular heid: anterior surface o the medial hauf o the clavicle. Sternocostal head: anterior surface o the sternum, the superior sax costal cartilages, an the aponeurosis o the freemit oblique muscle |
| Insertion |
Lateral lip o the bicipital groove o the humerus (anteromedial proximal humerus) |
| Artery | pectoral branch o the thoracoacromial trunk |
| Nerve |
lateral pectoral nerve an medial pectoral nerve Clavicular head: C5 an C6 Sternocostal heid: C7, C8 an T1 |
| Actions |
Clavicular heud: flexes the humerus Sternocostal head: Adducts the humerus As a hale, adducts an medially rotates the humerus. It an aa draws the scapula anteriorly an inferiorly. |
| Antagonist | Deltoid |
| Identifiers | |
| Laitin | Musculus pectoralis major |
| TA | A04.4.01.002 |
| FMA | 9627 |
|
Anatomical terms o muscle [eedit on Wikidata] | |
The pectoralis major (frae Laitin: pectus, breast) is a thick, fan-shaped muscle, situatoy at the chest (anterior) o the human bouk.