Spine Nerve Map [upd] Guide

are bands of skin supplied by a single spinal nerve root. If you draw a line down the center of the human body, the dermatomes run horizontally like stacked onion rings, except for the limbs, where they run longitudinally. This is why shingles (herpes zoster), which attacks specific dorsal root ganglia, creates a painful rash that wraps around exactly one side of the torso without crossing the midline.