I just finished reading his book (Oliver Sacks' Musicophilia) and discovered there are several YouTube interviews with him, him being the author of a mesmerizing book compiling a string of varying neurological conditions relating to music.
I had never given much thought to the dark side of music before but learning about the number of people who suffer from afflictions where music literally tortures them internally was disturbing while illuminating none the less. He goes on to describe how music also plays an important role in therapy for individuals suffering from strokes to Parkinson's disease. Music can actually breathe life into people otherwise frozen and unable to express themselves or communicate at all. The general gist of this is we have only just begun to understand all the powers and healing properties music carries for humanity.
Sack's book explores the curious ways music can live inside our body's and does so with the delicacy and analytical finesse of a sensitive detective.
Here are a few clips of Sacks discussing a few themes found in his book.