Shoulder - Muscles Flashcards
1
Q
Name the four pectoral muscles.
A
- Pec major
- Pec minor
- Serratus anterior.
- Subclavius muscle.
2
Q
How many origins does Pec Major have?
A
2
3
Q
Name 2 origins of Pec major.
A
- Clavicular head : Anterior surface of the medial clavicle.
- Sternocostal head : Anterior surface of the sternum and superior 6 costal cartilage.
4
Q
Name insertion of pec major.
A
Lateral lip of the intertubular sulcus of the humerus.
5
Q
What nerve innervates pec major?
A
Medial and lateral pectoral nerves. (C5-C8 and T1)
6
Q
What arteries supply pec major?
A
Thoracoacromial and lateral thoracic.
7
Q
What vascular structure lies in the deltopectoral triangle?
A
Cephalic vein.
8
Q
Action of Pec Major.
A
- Adduction of arm at shoulder.
2. Medial rotation of humerus.
