Which of the following statements is true regarding dermatomes? Multiple Choice O Each dermatome provides sensory input from a broad area of the skin (e g. the entire upper limb) to a specific spinal nerve Dermatomes overlap at their edges by as much as 50% Dermatomes are not used to assess spinal nerve damage. Dermatomes are very precise representations of the cutaneous regions that are innervated by each spinal nerve.