Brachial Plexus

Question 1

What nerve roots form the superior trunk of the brachial plexus?

Answer 1

C5,C6

Question 2

What nerve roots form the middle trunk of the brachial plexus?

Answer 2

continuation of C7

Question 3

What nerve roots from the inferior trunk of the brachial plexus?

Answer 3

C8 and T1

Question 4

What divisions make up the lateral cord of the brachial plexus?

Answer 4

The anterior division of the superior trunk and the anterior division of the middle trunk

Question 5

What divisions make up the posterior cord of the brachial plexus?

Answer 5

The posterior divisions of the superior, middle and inferior trunks

Question 6

What divisions form the medial cord of the brachial plexus?

Answer 6

The anterior division of the inferior trunk

Question 7

What divisions form the posterior cord of the brachial plexus?

Answer 7

The posterior divisions of the superior, middle and inferior trunks

Question 8

What divisions form the medial cord of the brachial plexus?

Answer 8

The anterior division of the inferior trunk

Question 9

Which cord of the brachial plexus does the axillary nerve arise from?

Answer 9

Posterior cord

Question 10

Which cord of the brachial plexus does the musculocutaneous nerve arise from?

Answer 10

The lateral cord

Question 11

Which cord of the brachial plexus Does the median nerve arise from?

Answer 11

The lateral cord and the medial cord

Question 12

Which cord of the brachial plexus does the ulnar nerve arise from?

Answer 12

Medial cord

Question 13

Which cord of the brachial plexus does the radial nerve arise from?

Answer 13

Posterior cord

Question 14

What are the nerve roots of the musculocutaneous nerve?

Answer 14

C5, C6, C7

Question 15

What are the nerve roots of the axillary nerve?

Answer 15

C5,C6

Question 16

What are the nerve roots of the median nerve

Answer 16

C5, C6, C7, C8, T1

Question 17

What are the nerve roots of the radial nerve?

Answer 17

C5,C6,C7,C8

Question 18

What are the nerve roots of the ulnar nerve?

Answer 18

C8, T1

Question 19

What is the motor distribution of the musculocutaneous nerve?

Answer 19

Biceps brachii, coracobrachialis, brachialis

Question 20

What is the sensory distribution of the musculocutaneous nerve?

Answer 20

Lateral half of anterior forearm
Small lateral portion of the posterior forearm

Question 21

What is the motor distribution of the axillary nerve?

Answer 21

Teres minor, posterior and anterior deltoids

Question 22

What is the sensory distribution of the axillary nerve?

Answer 22

Inferior aspect of the deltoids

Question 23

What is the motor distribution of the median nerve?

Answer 23

Most forearm flexor muscles
Thenar muscles
Lateral 2 lumbrical muscles (correspond to the index and middle fingers)

Question 24

What is the sensory distribution of the median nerve?

Answer 24

Lateral part of palm
Lateral 3 1/2 fingers on palmar surface of hand

Question 25

What is the motor distribution of the radial nerve?

Answer 25

Triceps brachii
muscles of the posterior forearm (primarily wrist and hand extensors)

Question 26

What is the sensory distribution of the radial nerve?

Answer 26

Posterior arm and forearm
Posterolateral aspect of the hand

Question 27

What is the motor distribution of the ulnar nerve?

Answer 27

Most muscles within the hand (except the thenar muscles and the lateral 2 lumbricals)
Flexor carpi ulnaris
Medial 1/2 of Flexor digitorum profundus

Question 28

What is the sensory distribution of the ulnar nerve?

Answer 28

Anterior and posterior surfaces of the medial 1 1/2 fingers and their assossciated palm areas