Upper Limb

Question 1

Nerve root for:

• musculocutaneous
• axillary

Answer 1

• musculocutaneous: C5-7

- axillary: C5-6

Question 2

Nerve root for:

• radial
• median
• ulnar

Answer 2

• radial + median: C5-T1

- ulnar: C7-T1

Question 3

Sensory territory of:

• musculocutaneous
• axillary

Answer 3

musculocutaneous: lateral forearm
axillary: lateral arm/skin over deltoid

Question 4

Sensory territory of radial nerve:

Answer 4

• posterior arm + forearm

- dorsum of lateral three digits

Question 5

Median and ulnar sensory territories are only in the:

Answer 5

hand

Question 6

Muscles innervated by the musculocutaneous

Answer 6

• coracobrachialis
• biceps brachii
• brachialis

Question 7

Axillary: muscles innervated

Answer 7

• delt

- teres minor

Question 8

Two pathologies assc with axillary nerve

Answer 8

• surgical neck of humerus

- anterior shoulder dislocation

Question 9

Muscles innervated by the radial nerve:

Answer 9

• triceps
• forearm extensors
• APL, EPL, EPB, EI

Question 10

Median nerve: muscles innervated

Answer 10

• most forearm flexors
• thenar muscles
• lateral two lumbricals

Question 11

What are the three thenar muscles?

Answer 11

-APB, FPB, opponens pollicis

Question 12

2 Radial nerve pathologies:

Answer 12

• wrist drop
• Saturday night palsy
• midshaft fracture of humerus

Question 13

Median nerve assc pathologies (3)

Answer 13

• supracondylar fracture
• wrist laceration
• carpal tunnel

Question 14

-2 Pathologies assc with ulnar nerve

Answer 14

fracture of medial condyle

fracture of hook of hamate

Question 15

Innervation of rhomboids

Answer 15

-dorsal scapular nerve (C5)

Question 16

Brachioradialis:

specific innervation

Answer 16

-muscular branches of radial nerve

Question 17

FCR specific innervation

Answer 17

anterior interosseous nerve (median)

Question 18

interossei specific innervation

Answer 18

deep branch of ulnar

Question 19

APB specific innervation

Answer 19

recurrent branch of median

Question 20

Actions of rhomboids

Answer 20

retract and rotate scapula

Question 21

Deltoid actions

Answer 21

• anterior: flex at shoulder
• middle: abduct
• posterior: extend at shoulder

Question 22

FCR actions

Answer 22

-flexion + abduction at wrist

Question 23

Interossei functions

Answer 23

• abducts fingers

- flexes mcp, extends PIP

Question 24

Sensation to medial forearm

Answer 24

medial antebrachial cutaneous (C8,T1)

Question 25

Branches of the posterior cord?

Answer 25

axillary + radial

Question 26

Branches of medial cord?

Answer 26

-median + ulnar

Question 27

Branches of lateral cord?

Answer 27

-median + musculocutaneous

Question 28

Only nerve receiving no input from upper trunk?

Answer 28

-ulnar