Pectoral Muscles Flashcards
(3 cards)
1
Q
O: 3rd, 4th, 5th ribs
I: Coracoid process of scapula
N: Medial pectoral nerve from brachial plexus
A: Depresses point of shoulder, elevates the ribs of origin of scapula is fixed
A
Pectoralis minor
2
Q
O: First costal cartilages
I: Clavicle
N: C5 C6, nerve to subclavius from upper frank of brachial plexus
A: Depresses the clavicle and steadies this bone during movements of the shoulder girdle
A
Subclavius
3
Q
O: Clavicle, Sternum, Upper 6 costal cartilages
I: Humerus (inter-tubercular sulcus)
N: medial and lateral pectoral nerves from brachial plexus
A: adducts arm and rotates it medially
A
Pectoralis major
