I will describe two experiences that I can vouch for as factual because I was the one whom experienced them. The anomaly congruent to both experiences is as follows: A PARTICULAR MUSCULAR MOTION MAY BE UNAVAILABLE . In the case of my spinal stenosis surgery in Feb.,2008 and after several months of recovery I embarked on training outside in the Louisville park. Many times in the past I had “run the steps” cut from stone many years ago. At this moment when my wife said “go”!….nothing happened. It was like My leg was totally paralyzed. I felt defeated…all this surgery…the pain…and now a paralytic? I couldn’t accept that. After some introspection I decided that muscle motion is very complicated. The sum of the working parts does not add up to a movement. I then worked very hard at visualizing what the brain must be thinking (the harmony of motion maybe?). In about fifteen minutes I was ready to try again…no room for a single negative thougnt. In a few minutes I was running the entire set of 75 steps or so just like I remembered it. 2009, Knee operation ( bilateral staged). It was the second operation that brought out this anomaly again. As I set with my knee flex machine flexing me to 75 deg on only my 5th day out I was feeling pretty good. I could do vertical leg raises with gentleness. A couple of hours later I could not do the vertical raise…it was the scary feeling of having a total nerve block. I could wiggle my toes and flex my feet but when it came to …