After the mice ran through a maze in a bout 10 minutes, Merrell played classical music to one group and heavy metal to another for 10 hours a day. After three weeks, the mice exposed to classical music made it through the maze in a minute and a half. The rock music group took 30 minutes. None of the classical mice did that. After intensive experimentation with students, he found that music was the key.
Relaxation induced by specific music leaves the mind alert and able to concentrate.
Using specific music allows you to do strenuous mental work while remaining relaxed and focused. Brain waves speed up. The pulse and blood pressure decrease. The brain waves slow down. The muscles relax.