7. Axilla + Brachial Plexus

Question 1

Which muscle forms the anterior wall of the axilla?

Answer 1

Pectoralis major

Question 2

When does the brachial vein become the axillary vein?

Answer 2

At the lower border of teres major

Question 3

What muscle contributes to the posterior wall of the axilla?

Answer 3

Trees major

Question 4

When does the subclavian artery become the axillary artery?

Answer 4

Lateral border of the first rib

Question 5

Which anterior rami form the brachial plexus?

Answer 5

C5-T1

Question 6

What are the trunks in the brachial plexus?

Answer 6

Combinations of roots, which give rise to divisions

Question 7

What roots form the superior trunk?

Answer 7

anterior rami of C5&C6

Question 8

What roots from the middle trunk?

Answer 8

Anterior rams of C7

Question 9

What roots from the interior trunk?

Answer 9

Anterior rami of C8&T1

Question 10

What does each trunk divide into?

Answer 10

Anterior and posterior divisons

Question 11

What do the anterior and posterior trunk divisions combine to form?

Answer 11

Cords

Question 12

What is the medial cord a continuation of?

Answer 12

anterior division of the inferior trunk

Question 13

Divisions of which trunks form the lateral cord?

Answer 13

Anterior divisions of the superior and middle trunks

Question 14

Divisions of which trunks form the posterior cord?

Answer 14

Posterior divisions of superior, middle and inferior trunks

Question 15

Where does the ulnar nerve arise from?

Answer 15

Medial cord

Question 16

Where does the musculocutaneous nerve arise from?

Answer 16

Lateral cord

Question 17

What does the posterior cord divide into?

Answer 17

Axillary nerve and radial nerve

Question 18

Which cords contribute to the formation of the median nerve?

Answer 18

Medial and lateral cords

Question 19

Where do the roots and trunks lie?

Answer 19

Between anterior and middle scalene muscles of the neck

Question 20

Where do the divisions lie?

Answer 20

Immediately posterior to the subclavian vessels in the root of the neck

Question 21

Where do the cords lie?

Answer 21

Around the axillary artery

Question 22

Which muscles does the musculocutaneous nerve supply?

Answer 22

Coracobrachialis
Biceps brachii
Brachialis

Question 23

Which compartment of the arm do the axillary and radial nerve supply?

Answer 23

Posterior

Question 24

Which is superior, the axillary or radial nerve?

Answer 24

Axillary nerve

Question 25

Which nerve is the most medial nerve of the names nerves of the brachial plexus?

Answer 25

Ulnar nerve

Question 26

Which nerve wraps around the posterior aspect of the surgical neck of the humerus?

Answer 26

Axillary nerve