By John Platt, Mother Nature Network

It's been said that music calms the savage beast, but the right music can also awaken someone who has, in effect, been slumbering.
The new documentary "Alive Inside" shows the transformative power of music as several elderly dementia patients are given iPods loaded with their favorite music. The previously unresponsive seniors quickly start to tap their toes, swing their hands, and, incredibly, start having long discussions about their passion for music and its role in their lives.
In the following clip from the film, a man named Henry - who normally sits quietly in his chair, hunched over, barely speaking - comes alive after listening to music. Asked about his favorite music, he starts talking about Cab Calloway, and even starts to sing some of his favorite songs: