"The musician is constantly adjusting decisions on tempo, tone, style, rhythm, phrasing, and feeling - training the brain to become incredibly good at organizing and conducting numerous activities at once. Dedicated practice of this orchestration can have a great payoff for lifelong attentional skills, intelligence, and an ability for self-knowledge and expression." - Ratey, John J., M.D.

From: A User's Guide to the Brain. New York: Pantheon Books, 2001.

Available here: MENC—The National Association for Music Education "Music Education Facts and Figures" 2002