1.2.1 Dermatomes of the Upper Limb

Question 1

What is the definition of a Dermatome?

Answer 1

The area of skin supplied by one spinal segmen

Question 2

What does dermatome C5 supply?

Answer 2

The anterior-most part of the arm

Question 3

What does dermatome C6 supply?

Answer 3

1. The lateral-most part of the arm
2. The lateral-most part of the wrist
3. The thumb

Question 4

What does dermatome C7 supply?

Answer 4

1. The posterior-most part of the arm
2. The middle park of the wrist
3. The index finger
4. The middle finger

Question 5

What does dermatome C8 supply?

Answer 5

1. The medial-most part of the arm
2. The medial-most part of the wrist
3. The ring-finger
   4, The pinkie-finger

Question 6

What is the clinical relevance of dermatomes?

Answer 6

Injury to the spinal cord / nerve roots conforms to dermatomes