"When you stumble into the shower shortly after you wake, you’re able to relax and, because you’re still tired, you’re able toreconnect with your subconscious. I’ve found this state to be so helpful in solving problems that I’ve had to devise ways to take notes on the shower wall."
Classical music is very rhythmic and, oddly enough, predictable. Classical also usually has a slower tempo, less than 60 beats per minute, whereas pop and jazz have unpredictable variances in tone and rhythm and often a much faster tempo....
Vinod Menon, Professor of Psychiatry and Behavioral Sciences at Stanford University’s School of Medicine, has written an interestingarticle on the subject. In the paper, Menon writes about music’s effect on the brain during an MRI. To simplify, the brain performs better when predictable patterns are in the music. During sudden breaks in the sound, the brain reacts to check on what’s happening. Your brain turns its attention back to the music, rather than stays on what you were concentrating on.