@jgweed,
Hi Joe,
If you google with the words
music therapy study you will find a whole bunch of studies that you can review and begin to trace for specific questions that you have.
The essence of alternative therapies is that it is individualized. For example, it is rather ridiculous to try one type of music for a whole group of people to see if it relaxes them, reduces blood pressure, etc. Each person is different and embraces different types of vibrational energy, thus alternative therapies of any sort must be chosen to suit the person's individual constitution.
This concept is something that medical journals in the U.S. just don't get but receives much wider acceptance in Europe, Asia, and Latin America. Maybe because they have more mature cultures. I don't know.
In any case, anyone who has ever listened to music knows that it can have very profound effects on the mind and body, and I think it is a fantastic field to explore and understand.
Hope this helps,
Rich