Dermatomes

Question 1

Which cervical nerve supplies the skin of the neck, temple, forehead, and occiput?

Answer 1

C2

Question 2

What regions are innervated by C3?

Answer 2

Entire neck, posterior cheek, temporal area, and forward prolongation under mandible

Question 3

Which areas of the body does C4 provide sensation to?

Answer 3

Shoulder area, clavicular area, upper scapular area

Question 4

What regions are affected by C5?

Answer 4

Deltoid area, anterior arm, and base of the thumb

Question 5

Which cervical nerve innervates the anterior arm and radial side of the hand, including the thumb and index finger?

Answer 5

C6

Question 6

What regions are innervated by C7?

Answer 6

Lateral arm and forearm to index, long, and ring fingers

Question 7

What areas does C8 primarily provide sensation to?

Answer 7

Medial arm and forearm to long, ring, and little fingers

Question 8

What area of the body is supplied by T1?

Answer 8

Medial forearm to the base of the little finger

Question 9

Which thoracic nerve supplies the medial side of the upper arm, medial elbow, pectoral, and midscapular areas?

Answer 9

T2

Question 10

What region is innervated by T3-T6?

Answer 10

Upper thorax

Question 11

Which thoracic nerves provide sensation to the costal margin?

Answer 11

T5-T7

Question 12

What regions are affected by T8-T12?

Answer 12

Abdomen and lumbar region

Question 13

Which lumbar nerve supplies the back, over the trochanter, and the groin area?

Answer 13

L1

Question 14

What does L2 innervate?

Answer 14

Back and front of the thigh to the knee

Question 15

What areas of the body are served by L3?

Answer 15

Back, upper buttock, anterior thigh and knee, medial lower leg

Question 16

Which lumbar nerve provides sensation to the medial buttock, lateral thigh, medial leg, dorsum of the foot, and big toe?

Answer 16

L4

Question 17

What regions does L5 innervate?

Answer 17

Buttock, posterior and lateral thigh, lateral aspect of leg, dorsum of foot, medial half of sole, first, second, and third toes

Question 18

What areas are affected by S1?

Answer 18

Buttock, posterior thigh, and posterior leg

Question 19

Which sacral nerve supplies the same region as S1 and also supports the groin area?

Answer 19

S2

Question 20

What does S3 primarily supply?

Answer 20

Groin and medial thigh to knee

Question 21

What areas are innervated by S4?

Answer 21

Perineum, genitals, and lower sacrum

Question 22

What regions are supplied by C2 apart from the skin of the neck?

Answer 22

Temple, forehead, and occiput

Question 23

What does C3 innervate under the mandible?

Answer 23

Temporal area prolongation

Question 24

Which lumbar nerve supplies the medial lower leg in addition to the anterior thigh and knee?

Answer 24

L3

Question 25

What area is associated with the thoracic nerves T5-T7?

Answer 25

Costal margin

Question 26

Which sacral nerve affects both the posterior thigh and the groin area?

Answer 26

S2

Question 27

Which areas are primarily affected by T8-T12?

Answer 27

Abdomen and lumbar region

Question 28

What does C5 innervate in the anterior arm apart from the deltoid area?

Answer 28

Base of the thumb

Question 29

What cervical nerve supplies sensation to the shoulder area?

Answer 29

C4

Question 30

Which thoracic nerve innervates the medial upper arm, medial elbow, and pectoral areas?

Answer 30

T2

Question 31

What does S4 primarily innervate apart from the lower sacrum?

Answer 31

Perineum and genitals

Question 32

Which cervical nerve provides sensation to the radial side of the hand?

Answer 32

C6

Question 33

What lumbar nerve innervates the dorsum of the foot along with the first three toes?

Answer 33

L5

Question 34

What areas does T1 supply apart from the medial forearm?

Answer 34

Base of the little finger

Question 35

Which sacral nerve provides sensation to the groin and medial thigh?

Answer 35

S3