Shoulder/Pectoral Girdle

Question 1

Pectoralis Minor

Answer 1

Origin: Ribs 3, 4, 5
Insertion: Coracoid process
Action: Protraction of scapula, depression of shoulder girdle

Question 2

Coracobrachialis

Answer 2

Origin: Coracoid process
Insertion: Med. surface of humerus
Action: Flex. and adduction of humerus

Question 3

Trapezius

Answer 3

Origin: Base of cranium, cervical and thoracic vertebrae
Insertion: Clavicle and scapula
Action: Lat. flex. and rotation of cervical vertebrae, retraction of shoulder girdle, elevation and depression of shoulder girdle

Question 4

Rhomboids

Answer 4

Origin: C7 to T5
Insertion: Med. border of scapula
Action: Elevation and retraction of shoulder girdle

Question 5

Serratus Anterior

Answer 5

Origin: Upper 8/9 ribs
Insertion: Med. border of scapula
Action: Protaction of scapula, stability of shoulder girdle