Final answer:
To test for the L5 dermatome, check the leg. The L5 dermatome covers the lateral leg and dorsum of the foot, and testing sensation in this area helps evaluate the L5 nerve function.
Step-by-step explanation:
To test for the L5 dermatome, you would typically check the leg. The L5 dermatome is a specific area of skin innervated by the L5 spinal nerve. It covers the lateral leg and dorsum of the foot. By assessing sensation in this area, healthcare professionals can evaluate the function of the L5 nerve.