A striking difference When we compared the brains of the musicians and the non-musicians, the differences were striking. Even before we induced pain, the musicians showed a more finely tuned hand map in the brain, and the more hours they had spent practising, the more refined this map was found to be.
After pain was induced, the musicians reported experiencing less discomfort overall. And while the hand map in non-musicians’ brains shrank after just two days of pain, the maps in musicians’ brains remained unchanged – amazingly, the more hours they had trained, the less pain they felt.
This was a small study of just 40 people, but the results clearly showed that the musicians’ brains responded differently to pain. Their training seems to have given them a kind of buffer against the usual negative effects, both in how much pain they felt and in how their brain’s motor areas reacted.
These are the main findings, but reading the whole article gives proper context. It's a pleasant read imo.