Dermatome Mapping - Exam 1

Question 1

Anterior and inner surface of lower limbs

Answer 1

L1, 2, 3, 4

Question 2

Foot

Answer 2

L4, L5, S1

Question 3

Medial side of great toe

Answer 3

L4

Question 4

Posterior and outer surface of lower limbs

Answer 4

S1, S2, L5

Question 5

Lateral margin of foot and little toe

Answer 5

S1

Question 6

Perineum

Answer 6

S2, S3, S4

Question 7

Level of umbilicus

Answer 7

T10

Question 8

Inguinal or groin regions

Answer 8

T12

Question 9

Clavicles

Answer 9

C5

Question 10

Lateral parts of upper limbs

Answer 10

C5, C6, C7

Question 11

Medial sides of upper limbs

Answer 11

C8, T1

Question 12

Thumb

Answer 12

C6

Question 13

Hand

Answer 13

C6, C7, C8

Question 14

Ring and little fingers

Answer 14

C8

Question 15

Level of nipples

Answer 15

T4

Question 16

Sensation from forehead, scalp, and upper eyelids

Answer 16

V1 - ophthalmic nerve (Trigeminal V)

Question 17

Sensor from lower eyelids, cheeks, nostrils, upper lip, upper teeth

Answer 17

V2 - maxillary nerve (trigeminal V)

Question 18

Sensations from lower jaw, lower teeth, lower lip, part of the tongue

Answer 18

V3 - mandibular nerve (trigeminal V)

Question 19

Peri-anal/anal surgery (saddle block)

Answer 19

S2-S5

Question 20

Foot/ankle surgery

Answer 20

L2

Question 21

Thigh, lower leg, knee surgery

Answer 21

L1

Question 22

Vaginal delivery, uterine, hip, tourniquet, TURP surgery

Answer 22

T10

Question 23

Scrotum surgery

Answer 23

S3

Question 24

Penis surgery

Answer 24

S2

Question 25

Testicular surgery

Answer 25

T8

Question 26

Urologic, gynecologic, lower abdominal surgery

Answer 26

T6

Question 27

Cesarean section, upper abdominal surgery

Answer 27

T4