Upper Extremity - Shoulder and Pec Girdle

Question 1

Origin and Insertion of Deltoid?

Answer 1

O - Scapular spine, acromion and clavicle

I - deltoid tuberosity of humerus

Question 2

Action and Innervation of Deltoid?

Answer 2

Abducts shoulders, flexes and extends arm

Axillary nerve

Question 3

Origin and Insertion of Pec Major?

Answer 3

O - clavicle, upper ribs, sternum

I - humerus

Question 4

Action and Innervation of Pec Major?

Answer 4

flexes arm, adducts and medially rotates shoulder

Medial and Lateral pectoral nerves

Question 5

Origin and Insertion of Pec Minor?

Answer 5

O - ribs III to V

I - coracoid of scapula

Question 6

Action and Innervation of Pec Minor?

Answer 6

Protracts and depresses scapula

Medial Pectoral Nerve

Question 7

Origin and Insertion of Serratus Anterior?

Answer 7

O - lateral surface of upper ribs

I - medial border of scapula

Question 8

Action and Innervation of Serratus Anterior?

Answer 8

Protracts and holds scapula against thoracic wall, raise arm above 90 degrees
Long thoracic nerve

Question 9

Origin and Insertion of Subclavius?

Answer 9

O - rib 1

I - clavicle

Question 10

Action and Innervation of Subclavius?

Answer 10

Depresses and stabilizes clavicle

Subclavius nerve

Question 11

Borders of Quadrangular Space

Answer 11

Superior - inferior border of teres minor
Inferior - superior border of teres major
Medial - long head of triceps brachii
Lateral - surgical neck of humerus