Everything you always suspected about music is true. Scientists can point to the parts of the brain that music stimulates, where our deepest memories and feelings reside. The phenomenon even stretches back to before birth, when the sound of a heartbeat establishes our sensory proclivity toward music. This scientific material is offered in Alive Inside to buttress the rather remarkable anecdotal evidence we see for ourselves onscreen, as the power of music is used to revive the personalities of people with dementia and Alzheimer’s disease. Filmmaker Michael Rossato-Bennett tags along with Dan Cohen, a music-therapy proselytizer (and founder of the nonprofit Music & Memory), as Cohen travels to facilities for people living with dementia.