UE Dermatomes, Myotomes, and Reflexes

Question 1

Cervical rotation myotome

Answer 1

C1

Question 2

Shoulder shrug myotome

Answer 2

C2,3,4

Question 3

Shoulder abduction myotome

Answer 3

C5

Question 4

Elbow flexion myotome

Answer 4

C5,6

Question 5

Wrist extension myotome

Answer 5

C6

Question 6

Wrist flexion myotome

Answer 6

C7

Question 7

Elbow extension myotome

Answer 7

C7

Question 8

Little finger abduction myotome

Answer 8

T1

Question 9

Finger adduction myotome

Answer 9

T1

Question 10

Thumb extension myotome

Answer 10

C8

Question 11

No innervation to the skin dermatome

Answer 11

C1

Question 12

Posterior aspect of head dermatome

Answer 12

C2

Question 13

Posterior aspect of neck dermatome

Answer 13

C3

Question 14

Acromioclavicular joint dermatome

Answer 14

C4

Question 15

Lateral arm dermatome and nerve

Answer 15

C5 - axillary nerve

Question 16

Lateral forearm and palmar tip of thumb dermatome and nerve

Answer 16

C6 - musculocutaneuous nerve

Question 17

Palmar distal phalanx middle finger dermatome and nerve

Answer 17

C7 - posterior cutaneous branch of radial nerve

Question 18

Palmar distal phalanx of little finger dermatome and nerve

Answer 18

C8 - brachial cutaneous nerve

Question 19

Medial forearm dermatome

Answer 19

T1

Question 20

Medial arm dermatome

Answer 20

T2

Question 21

Biceps tendon reflex

Answer 21

C5

Question 22

Brachioradialis reflex

Answer 22

C6

Question 23

Triceps reflex

Answer 23

C7