Pectoralis Major Flashcards
1
Q
What is the Action of all the fibers of the Pectoralis Major?
A
Adduct the shoulder
Medially rotate the shoulder
Assist to elevate the thorax during forced inhalation (With arm fixed)
2
Q
What is the action of of the Upper Fibers of the Pectoralis Major?
A
Flex the shoulder
Horizontally adduct the shoulder
3
Q
What is the action of the Lower fibers of the Pectoralis Major?
A
Extend the shoulder
4
Q
What is the origin of the Pectoralis Major?
A
Medial half of clavicle, sternum and cartilage of first through sixth ribs.
5
Q
Where is the insertion of the Pectoralis Major?
A
The crest of greater tubercle of humerus
