Peripheral cutaneous innervation

Question 1

posterior neck

Answer 1

C2-C8 posterior rami

Question 2

inferior and posterior ear, skin under ear

Answer 2

great auricular nerve (C2,C3)

Question 3

T2-Tll vertebral levels of trunk

Answer 3

intercostal nerves

Question 4

T12 spinal level

Answer 4

subcostal nerve

Question 5

lower anterolateral trunk

Answer 5

iliohypogastric and ilioinguinal nerves (bifurcation of L1 anterior ramus)

Question 6

lateral shoulder

Answer 6

axillary (C5,6)

Question 7

top of shoulder

Answer 7

supraclavicular nerve (C3,4)

Question 8

lateral forearm

Answer 8

musculocutaneous nerve (C5,6,7)

Question 9

dorsum of lateral 3 1/2 digits

anatomical snuff box

Answer 9

radial nerve (C5-T1)

Question 10

medial 1 1/2 fingers

Answer 10

ulnar (C8-T1)

Question 11

anterios lateral 1 1/2 fingers

Answer 11

median nerve (C5-T1)

Question 12

superior medial thigh

Answer 12

ilioinguinalnerve (L1)

Question 13

superior middle thigh

Answer 13

genitofemoral

Question 14

lateral upper thigh

Answer 14

lateral cutaneous (L2,3)

Question 15

medial thigh

Answer 15

obturator (L2-4)

Question 16

anterior leg

Answer 16

saphenous nerve (L3,4) - branch of femoral nerve

Question 17

lateral leg/foot

Answer 17

sural nerve (S1,2)

Question 18

dorsum of foot

Answer 18

superficial fibular (L4-S1)

Question 19

1st web space

Answer 19

deep fibular (L5)

Question 20

heel and plantar surface of foot

Answer 20

tibial nerve (L4-S3)

Question 21

posterior thigh

Answer 21

posterior cutaneous nerve (S1-3)