Dermatomes and Nerve Roots

Question 1

Nerve Root: C1

Answer 1

Vertex of Skull

Question 2

Nerve Root: C2

Answer 2

Temple, Forehead, Occiput

Question 3

Nerve Root: C3

Answer 3

Entire Neck, Posterior Cheek, Temporal Area

Question 4

Nerve Root: C4

Answer 4

Shoulder (supraclavicular), Clavicle, Upper Scapula

Question 5

Nerve Root: C5

Answer 5

Deltoid, Lateral aspect of Arm and Elbow

Question 6

Nerve Root: C6

Answer 6

Lateral aspect of Forearm, Thumb

Question 7

Nerve Root: C7

Answer 7

Index, Middle, and Ring fingers

Question 8

Nerve Root: C8

Answer 8

Medial Forearm, Little Finger

Question 9

Nerve Root: T1

Answer 9

Medial Forearm, Medial Elbow

Question 10

Nerve Root: T2

Answer 10

Medial Arm, Axillary Area

Question 11

Nerve Root: T3-T6

Answer 11

Upper Thorax (small strip of skin)

Question 12

Nerve Root: T4-T5 (T4)

Answer 12

Nipple Line (strip of skin)

Question 13

Nerve Root: T5-T7

Answer 13

Costal Margin

Question 14

Nerve Root: T8-T12

Answer 14

Abdomen and Lumbar Region

Question 15

Nerve Root: T10

Answer 15

Umbilicus

Question 16

Nerve Root: L1

Answer 16

Just above the Inguinal Line

Question 17

Nerve Root: L2

Answer 17

Anterolateral aspect of the thigh

Question 18

Nerve Root: L3

Answer 18

Medial Thigh, Medial Knee, Patellar Area

Question 19

Nerve Root: L4

Answer 19

Medial Malleolus, Medial Leg

Question 20

Nerve Root: L5

Answer 20

Lateral Leg, Dorsum of Foot (1st to 3rd digits)

Question 21

Nerve Root: S1

Answer 21

Posterior Leg, Calcaneus, 4th-5th Digits

Question 22

Nerve Root: S2

Answer 22

Posterior Knee, Posterior Thigh

Question 23

Nerve Root: S3

Answer 23

Groin, Buttocks Area

Question 24

Nerve Root: S4-S5

Answer 24

Perineum, Genitals, Lower Sacrum, Perianal Area