Coalition for Music Education in Canada

http://musicmakesus.ca/educate/articles-news/

Research shows that when a child listens to classical music the right hemisphere of the
brain is activated, but when a child studies a musical instrument both left and right
hemispheres of the brain light up. Significantly, the areas that become activated are the
same areas that are involved in analytical and mathematical thinking.

Dee Dickinson, Music and the Mind. Seattle: New Horizons for Learning, 1993