Two Cerebral Hemispheres 
Left and Right
lLeft Hemisphere
¡Processes things more in parts and sequentially
¡Musicians process music in left hemisphere
lRight Hemisphere
¡Music and Arts have been considered right-brain "frills" but trained musicians use more left-brain and novice musicians use more right.
¡Higher-level mathematicians, problem solvers, and chess players actually have more right-brained activity, but beginners use more left brain.