Dermatomes

Question 1

A section of skin with sensation that is associated with a certain spinal cord segment. Connected to the dermatome via a Nerve.
-Purely sensory; no motor

Answer 1

Dermatome

Question 2

Loss of sensation to skin over back of head

Answer 2

C2 Dermatome

Question 3

Connects the C2 dermatome and the Spinal Cord

Answer 3

Greater Occipital Nerve

Question 4

Palpate the hard, bony prominence on the back of the skull to find this dermatome.

Answer 4

C2 Dermatome

Question 5

Palpate the C7 Spinous Process (Vertebral Prominence) for this dermatome.

Answer 5

C5 Dermatome

Question 6

Palpate the nipple for this dermatome.
-Sensation stops here when doing a Spinal

Answer 6

T4 Dermatome

Question 7

Palpate the Xiphoid Process (area at the end of the sternum) for this dermatome.

Answer 7

T6 Dermatome

Question 8

Palpate at the Umbilicus for this dermatome

Answer 8

T10 Dermatome

Question 9

Palpate the Inguinal Ligament (arises from ASIS and attaches to the pubic tubercle) for this dermatome.

Answer 9

L1 Dermatome

Question 10

Dermatome that starts on hip, descends the thigh diagonally, rotating from lateral side to medial side. Then, it goes over the patella anteriorly, to the anterior shin, and then the medial malleolus.
-Palpate at the Medial Malleolus or the Patella

Answer 10

L4 Dermatome

Question 11

If you have loss of sensation at the Medial Malleolus, do you need to check sensation at the patella as well?

Answer 11

No, the whole L4 dermatome is associated with the same spinal cord segment.

Question 12

Dermatome found at the dorsum/plantar surface of foot and lateral leg.

Answer 12

L5 Dermatome

Question 13

Dermatome found on the Lateral, Posterior hip/thigh/leg/malleolus

Answer 13

S1 Dermatome

Question 14

Dermatome found on the Medial, Posterior hip/thigh/leg/Malleolus

Answer 14

S2 Dermatome

Question 15

Dermatome found on the genitalia

Answer 15

S2-S3 Dermatome

Question 16

Dermatome over the Thumb and Thenar Eminence

Answer 16

C6 Dermatome

Question 17

Dermatome over the Intermediate Compartment, index finger, and middle finger

Answer 17

C7 Dermatome

Question 18

Dermatome over the ring finger, little finger, and hypothenar eminence

Answer 18

C8 Dermatome

Question 19

Contribution to the wrist on the thumb side (lateral side)

Answer 19

C5 Dermatome

Question 20

Contribution to the wrist on the pinky side (medial side)

Answer 20

T1 Dermatome