Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
1 Cards in this Set
- Front
- Back
|
Pectoralis Major
|
Proximal Attachment: Clavicular Head: anterior surface of medial half of clavicle. Sternocostal Head: anterior surface of sternum, superior six costal cartilages, aponeurosis of external oblique muscles.
Distal Attachment: Lateral lip of intertubercular sulcus of humerus Peripheral Innervation: Lateral pectoral nerve; medial pectoral nerve Segmental Innervation: C5, 6, 7, 8, T1 Action: Adducts and medially rotates humerus; draws scapula anteriorly and inferiorly. Acting alone, clavicular head flexes humerus and sternocostal head extends it from the flexed position. |
