Dermatomes

Question 1

C2 to C4

Answer 1

The C2 dermatome covers the occiput and the top part of the neck. C3 covers the lower part of the neck to the clavicle. C4 covers the area just below the clavicle.

Question 2

C5 to T1

Answer 2

Situated in the arms. C5 covers the lateral arm at and above the elbow. C6 covers the forearm and the radial (thumb) side of the hand. C7 is the middle finger, C8 is the medial aspect of the hand, and T1 covers the medial side of the forearm.

Question 3

T2 to T12

Answer 3

The thoracic covers the axillary and chest region. T3 to T12 covers the chest and back to the hip girdle. The nipples are situated in the middle of T4. T10 is situated at the umbilicus. T12 ends just above the hip girdle.

Question 4

L1 to L5

Answer 4

The cutaneous dermatome representing the hip girdle and groin area is innervated by L1 spinal cord. L2 and 3 cover the front part of the thighs. L4 and L5 cover medial and lateral aspects of the lower leg.

Question 5

S1

Answer 5

S1 covers the heel and the middle back of the leg.

Question 6

S2

Answer 6

S2 covers the back of the thighs.

Question 7

S3

Answer 7

S3 cover the medial side of the buttocks

Question 8

S4-5

Answer 8

S4-5 covers the perineal region. S5 is of course the lowest dermatome and represents the skin immediately at and adjacent to the anus.