MSK Nerves

Question 1

What are the nerve roots of the musculocutaneous nerve?

Answer 1

C5-C7

Question 2

What is the motor function of the musculocutaneous nerve?

Answer 2

Elbow flexion (supplies biceps brachii) and supination

Question 3

What is the sensory supply of the musculocutaneous nerve?

Answer 3

Lateral aspect of forearm

Question 4

What are the axillary nerve roots?

Answer 4

C5, C6

Question 5

What is the motor function of the axillary nerve?

Answer 5

Shoulder abduction (supplies the deltoid)

Question 6

What is the sensory distribution of the axillary nerve?

Answer 6

Inferior region of deltoid muscle

Question 7

What nerve of the brachial plexus can be damaged by a humeral neck fracture/dislocation?

Answer 7

Axillary nerve
Will see a flattened deltoid muscle

Question 8

What are the nerve roots of the radial nerve?

Answer 8

C5 - C8

Question 9

What is the motor function of the radial nerve?

Answer 9

Extension - forearm, wrist, fingers and thumb

Question 10

What is the sensory distribution of the radial nerve?

Answer 10

Dorsal aspect of the hand between the 1st and 2nd metacarpals

Question 11

What nerve of the brachial plexus can be damaged by a humeral midshaft fracture?

Answer 11

Radial nerve

Question 12

Palsy of the radial nerve results in which clinical sign?

Answer 12

Wrist drop

Question 13

What nerve is damaged in carpal tunnel syndrome?

Answer 13

Median nerve

Question 14

What are the nerve roots of the median nerve?

Answer 14

C6-T1

Question 15

What is the motor function of the median nerve?

Answer 15

Pronation of forearm
Flexion of forearm, wrist and hand

Question 16

What is the sensory distribution of the median nerve?

Answer 16

Supplies the palmar aspect of the lateral 3 and 1/2 fingers

Question 17

What are the ulnar nerve roots?

Answer 17

C8, T1

Question 18

What is the motor function of the ulnar nerve?

Answer 18

Intrinsic muscles of hand - allows for fine motor movement
Wrist flexion

Question 19

What is the sensory distribution of the ulnar nerve?

Answer 19

Medial 1 and 1/2 fingers

Question 20

What nerve might be damaged by a medial epicondyle fracture?

Answer 20

ulnar nerve

Question 21

Damage of which nerve may result in a claw hand?

Answer 21

Ulnar nerve

Question 22

What are the nerve roots of the long thoracic nerve?

Answer 22

C5 - C7

Question 23

What muscle is supplied by the long thoracic nerve?

Answer 23

Serratus anterior

Question 24

Damage of which nerve results in a winged scapula?

Answer 24

Long thoracic nerve

Question 25

What is shown?

Answer 25

Erb’s palsy (waiter’s tip palsy)

Arm hangs by the side and is internally rotated with the elbow extended

Question 26

What causes erb’s palsy?

Answer 26

Damage of the upper trunk of the brachial plexus (C5, C6)
Can be secondary to shoulder dystocia during birth

Question 27

What does this image show?

Answer 27

Klumpke’s palsy

Question 28

Which nerves are damaged in Klumpke’s palsy?

Answer 28

Damage to the lower trunk of the brachial plexus (C8, T1)

Question 29

What palsy is associated with Horner’s syndrome?

Answer 29

Klumpke’s palsy

Question 30

What can cause a Klumpke’s injury?

Answer 30

Secondary to shoulder dystocia during birth
Can also be caused by sudden upwards jerk of the hand

Question 31

What are the nerve roots of the triceps reflex?

Answer 31

C7-C8

(Triceps is 7 letters, C7)

Question 32

What are the nerve roots of the biceps reflex?

Answer 32

C5-C6

(Biceps is 6 letters, C6)

Question 33

What are the nerve roots of the brachioradialis reflex?

Answer 33

C5-C6