Fascinating, Barb! I need to take a closer look at this… The equation is correct (did you see it in my slide from the Global Expo that Dr. Francomano and I presented? When I spoke at Dr. Sclafani’s conference, I was addressing doctors, so I flew through it, assuming they would understand and follow me… Nope! A few came up afterwards and asked for help, and a neurologist from Italy asked for a copy of the lecture. 😉 A famous engineer grabbed me, as HE knew what I was talking about!! I’d like to fiddle with your discussion a bit. I just wonder if our CSF pressure could change as fast as our blood pressure? It can swing wildly, after all… Thanks, Hon! 😉