I am reading your article sitting in a hospital bed after having back surgery for everything you described about the sciatic pain. I’ve been dealing with it for a few years. I got an MRI a month ago which revealed multiple herniated discs caused by degenerative disc disease, which I didn’t know I had. Therapy and epidurals gave me relief in the last, but the time between relapses gradually grew shorter. I wish you the best with your back issues and feel your pain, literally. I don’t wish it on anyone. Great explanation of it too. I will have to check out the book you reference for future use.