I had a head injury. I visited all the doctors that were involved in my treatment. Each of them either wrote a letter or did some test then wrote a letter saying I was good to go. My AME said to send med express in and see what they ask for. They asked for a lot but not everything. So I guess to answer your question I sent the medical files but only what they asked for. There a several letters from Dr’s explaining the details of the injury. I’ll tell you this. When you go to your Dr and tell them you are wanting to get FAA medical clearance they become very defensive. I had to explain to them over and over that they were not clearing me to fly but simply making a determination as to whether or not I had any lasting issues from my head injury. Ultimately it was a combination of letters from doctors and a lot of medical files.