Hi. This is MichaelZ. I was in a car accident in 1975. I began to develop minor problems very soon thereafter. The problem was an odd sensation of head banging/jarring/jostling when I walked or rode in a vehicle subject to bumping. It never interfered with life. In 1983, it became severe, and I was unable to function, had to change jobs, etc.. I saw one orthopedist/neurologist (and other specialists) after another and was repeatedly told there was no problem. Then, the MRI came along, and in 1994, I was told I had a herniated/ruptured disc at T-3/4 and a large ganglion cyst. I had surgery for the cyst, but surgery on the disc wasn't really possibly, I was told. Then I discovered something called "rolfing," which turned my life around. I went back to work and for a few years was more or less okay, had a day job and played music most nights. Then in late 2007, everything rapidly deteriorated. Again, severe head banging/jostling/jarring, as though I were being punched in the head. I spent four years seeing every kind of specialist imaginable, as well as rolfers, osteopaths, chiropractors, etc.. Finally in 2012, it was determined the same disc had re-ruptured and was placing some pressure on the cord. I had two operations in 2012 to remove the disc and disc matter. I didn't get better. In 2014, I entered a program of sports medicine to promote "core strength." I immediately got radically worse and developed a spondylolisthesis, for which I just had fusion surgery done. I continue to have severe problems with this head banging/jarring/jostling. I can't seem to find anyone else with these symptoms. If you're out there, please respond.