Question

Where would you test for L3 dermatome?

1) Cervical area
2) Thoracic area
3) Lumbar area
4) d) Sacral area

Answer 1

The L3 dermatome should be tested in the lumbar area. A light touch is used to assess sensory perception through the skin areas innervated by the L3 spinal nerve, typically around the upper thigh.

Step-by-step explanation:

The L3 dermatome is tested in the lumbar area of the body. A simple stimulus, such as a light touch with a cotton-tipped applicator, can be applied to this area to test sensory perception. Dermatomes are specific areas of the skin that are innervated by the sensory fibers of a particular spinal nerve. The L3 spinal nerve corresponds to the lumbar region and its dermatome would include specific skin areas generally around the upper thigh region. To properly assess the L3 dermatome, one would apply the stimulus to the skin where sensory endings related to the L3 spinal nerve are located, verifying the patient's ability to perceive the touch and checking for any differences in sensation.