Pectoral region

Question 1

Pectoralis major

Answer 1

Clavicular head- anterior have a medial aspect of clavicle

Sternocostal head - sternum upper 6 costal cartilage, aponeurosis of external oblique

lateral lip of intertubercular groove of humerus

Lateral (C5, C6, C7) and medial (C8, T1) pectoral nerves

Adducts and medially rotates humerus

Question 2

Pectoralis minor

Answer 2

Ribs 3 to 5 near costal cartilages

Coracoid process of Scapula

Medial pectoral, nerve (C8 T1)

Stabilizes Scapula against thoracic wall

Question 3

Subclavius

Answer 3

Rib one and costal cartilage

Inferior surface of medial, third clavicle

Nerve to subclavius C5 C6

Anchors and depresses the clavicle

Question 4

Serratus anterior

Answer 4

External surfaces of lateral parts of the 1-8 ribs

anterior surface of the medial border of the scapula

Long thoracic nerve C5 C6 C7

Protracts and upwardly rotate scapula hold scapula against thoracic wall