Clinical anatomy of the upper limb

Question 1

Nerve roots that make up the brachial plexus

Answer 1

C5-T1

Question 2

Nerve roots tested by:

a) biceps jerk
b) triceps jerk
c) supinator jerk

Answer 2

a) C5/C6
b) C7
c) C5/C6

Question 3

The radial nerve supplies which groups of muscle? Which myotome is being tested when these muscles are tested?

Answer 3

The extensors of elbow, wrist and finger. c7

Question 4

The musculocutaneous nerve supplies which muscle?

Answer 4

Biceps brachii- flexor of elbow

Question 5

Which muscle does the axillary nerve supply?

Answer 5

Deltoid- abduction of shoulder

Question 6

Which intrinsic muscles of the hand are supplied by the ulnar nerve?

Answer 6

All the intrinsic muscles of the hand except LOAF:
Lateral two lumbricals
Opponens pollicus
Abductor pollicus brevis
Flexor pollicus brevis

Question 7

Which intrinsic muscles of the hand are supplied by the median nerve?

Answer 7

LOAF muscles

Question 8

Finger flexion- nerves and myotome?

Answer 8

Median and ulnar

C8

Question 9

Thumb abduction- nerve and myotome?

Answer 9

Median nerve, T1

Question 10

Finger abduction- nerve and myotome?

Answer 10

Ulnar nerve, T1

Question 11

Nerve which provides sensory innervation to:

a) the “regimental badge” area
b) the lateral dorsum of hand
c) the medial dorsum of hand, and medial 1 and a half fingers
d) the lateral 2 and a half fingers

Answer 11

a) axillary nerve
b) radial nerve
c) ulnar nerve
d) median nerve

Question 12

Roots of the:

a) radial nerve
b) musculocutaneous nerve
c) axillar nerve
d) median nerve
e) ulnar

Answer 12

a) C5-T1
b) C5-C7
c) C5-C6
d) C6-T1
e) C8-T1