This is not the first time this sort of therapy has been suggested. It’s somewhat like TENS therapy, but the device is implanted, much like a pacemaker.
Yes, it’s scary, somewhat. Oh, and I wish that I had a better tool to reference sites than “Press This”, which I am using now. Sometimes I’m tired, I hurt, and I’m not in the best mood to write and heavily format a nice, tidy, attention-grabbing post for you, dear readers.