A recent article caught our attention, and that was a clinical study of the enhancements in brain activity and development of drummers. Yes, drummers specifically were studied, rather than all musicians. Typically you see a more generalized study group from across all instruments.
To paraphrase the conclusion of the study, students who are trained drummers from an early age develop more communication structures across the corpus callosum, which is the structure that separates the right and left hemispheres of the brain. The right side of your brain tends to control your artistic and creative ability, and your left side of your brain controls your analytical ability. Drummers who start training early can more effectively simultaneously engage both their right side and left sides of their brains across the board.