Question

what is a dermatome?
multiple choice
region of skin innervated by a single spinal nerve
branch of a spinal nerve that travels toward the posterior part of the body.
group of muscles innervated by a single spinal nerve.
cluster of nerve cell bodies within the peripheral nervous system.

Explanation:

A dermatome is defined as the region of skin innervated by a single spinal nerve. This is a key concept in understanding how sensory information from the skin is transmitted via spinal nerves. The other options describe different anatomical or physiological structures: a branch of a spinal nerve traveling posteriorly (not a dermatome), a group of muscles innervated by a single spinal nerve (which is a myotome, not a dermatome), and a cluster of nerve cell bodies in the PNS (which is a ganglion, not a dermatome).

Answer:

Region of skin innervated by a single spinal nerve.