Hi Gerry, it is very interested to think about. Don't worry about my scrunity, I am no expert, still learning and working things out just like you. I was just aware that anatomically what you had written wasn't 100% accurate, and now reflecting on the implications of that raises a load of questions! I think it makes sense that it would be involved in nerve compression episodes as you say...I'm not sure what your last question meant about painfree signalling