The thoracic dermatomes travel downward from where their nerves emerge from the spinal column and wrap around the torso. The first nine form relatively straight lines down the chest, while the ...

This is because each spinal nerve root—one on each side ... Shingles under the breast is not uncommon. In fact, the thoracic dermatome, comprised of 12 vertebrae (T1-T12), is the most common ...