Lab 3 Axilla

Question 1

What innervates Pec Minor?

Answer 1

Both medial and lateral pec nerves

Question 2

What innervates pec major?

Answer 2

Just lateral pec nerve

Question 3

Three main functions of Pec Major?

Answer 3

1. Adduct Arm
2. Medially Rotate Arm
3. Flex Arm

Question 4

The Pec minor has two functions on the scapula, what are they?

Answer 4

1. Protraction
2. Depression

Question 5

The Subscapularis Muscle is innervated by which two nerves? (C5-C6)

Answer 5

Upper and Lower Subscapular Nerve

Question 6

The Subscapularis shares two functions with the pectoralis major, what are they?

Answer 6

Adduction and Medial Rotation of the arm

Question 7

Which main muscle is innervated by the Long Thoracic Nerve? (Hint: it has an attachment to the medial part of the scapula)

Answer 7

Serratus Anterior

Question 8

Similar to the pec minor, but with a different function, what are the two functions of the Serratus Anterior?

Answer 8

1. Protraction of Scapula
2. Rotation of Scapula

Question 9

Coming off of the 3rd part of the Axillary Artery is the Subscapular Artery. Name its two branches

Answer 9

1. Circumflex Scapular Artery
2. Thoracodrosal Artery

Question 10

The Biceps, Coracobrachialis, and Brachialis are all innervated by _______ nerve with which segmental innervation?

Answer 10

Musculocutaneous, C5-C7

Question 11

Two main Upper Arm Flexor Muscles?

Answer 11

1. Biceps Brachii
2. Coracobrachialis

Question 12

In addition to flexing the Arm AND the Forearm, what other action can the Biceps do?

Answer 12

SUPINATE the forearm

Question 13

In addition to flexing the Upper arm, what other function can the coracobrachialis perform?

Answer 13

Arm Adduction

Question 14

Given that it inserts in the Ulna, what is the Sole function of the Brachialis?

Answer 14

to FLEX the forearm