A dermatome is an area of skin supplied by a single spinal nerve. There are 31 pairs of spinal nerves, forming nerve roots that branch from your spinal cord, but only 30 dermatomes. Your spinal nerves ...

Rhizotomy is a neurosurgical procedure wherein a sensory nerve is cut or ablated close to its entry into the spinal cord. The procedure selectively destroys problematic nerve roots in the spinal cord ...