Brachial Plexus

Question 1

What Nerve roots are involved in the axillary nerve?

Answer 1

C5 and C6

Question 2

What two muscles are supplied by the axillary nerve?

Answer 2

Deltoid and teres minor

Question 3

What action does deltoid perform?

Answer 3

shoulder abduction

Question 4

What action does teres minor perform?

Answer 4

external rotation

Question 5

What sensation does the axillary nerve provide?

Answer 5

Deltoid region and superior posterior arm

Question 6

What nerve roots are involved in the musculocutaneous nerve?

Answer 6

C5, C6 and C7

Question 7

Which muscles do the musculocutaneous nerve supply? What is their action?

Answer 7

Anterior compartment of the arm.

Elbow flexion

Question 8

Name 3 muscles supplied by the musculocutaneous nerve

Answer 8

coracobrachialis, brachialis, biceps brachii

Question 9

What sensation does the musculocutaneous nerve supply?

Answer 9

Lateral forearm

Question 10

What nerve roots are involved in the radial nerve?

Answer 10

C5, C6, C7, C8 and T1

Question 11

Which muscles are innervated by the radial nerve?

Answer 11

The posterior compartment of the forearm and arm

Question 12

What action do muscles supplied by the radial nerve do?

Answer 12

Elbow, wrist and digit extension

Question 13

Name the muscles supplied by the radial nerve?

Answer 13

Tricpes brachii
anconeus
brachoradialis
extensor carpia radialis longis and brevis
supinator
extensor digitorium
extensor carpi ulnaris
extensor pollicis longus and brevis

Question 14

What sensation does the radial nerve supply?

Answer 14

Posterior arm and forearm

lateral 2/3rds of the dorsum of the hands and fingers

Question 15

What nerve roots are involved in the median nerve?

Answer 15

C5, C6, C7, C8 and T1

Question 16

Which muscles are innervated by the median nerve?

Answer 16

Flexor muscles in the forearm (except flexor carpi ulnaris and the ulnar head of flexor digitorum profundus)
thenar muscles
radial two lumbricals

Question 17

What are the LOAF muscles?

Answer 17

Intrinsic hand muscles supplied by the median nerve
Lateral two lumbricals
Opponens pollicis
Abductor pollicis brevis
Flexor pollicis brevis

Question 18

What sensation does the median nerve supply?

Answer 18

lateral 2/3rds of the palm of the hand and fingers

Question 19

What nerve roots are involved in the ulnar nerve?

Answer 19

C8 and T1

Question 20

What muscles does the ulnar nerve innervate?

Answer 20

Flexor carpi ulnaris and the medial half of flexor digitorium profundus.
Intrinsic hand muscles (except LOAF)

Question 21

What sensation does the ulnar nerve provide?

Answer 21

Medial surface of dorsum and palm of the hand.