I just read an article featuring Mickey Hart of the Grateful Dead. The focus was on his experience using music and drumming to help him and others heal. His work now centers on using drumming as a means for helping children with mental illness move beyond their pain and isolation, allowing them to positively connect to the world around them. Thislink provides a nice video description of Mickey's work.
When I was in my darkest hours of mental illness, it was music, especially rhythmic music, that got me through.