My first experience of mapping was failing to connect with a bar stool which wasn’t where I thought it was. Many of us have a misconception of how our joints connect and where an action starts from. The Alexander teacher Barbara Conable has done extensive research and written books on the subject of body mapping.
A while ago I wrote an article about focal dystonia and mentioned Jerald Harscher, a guitarist and teacher with whom I had an enlightening session on Skype (even though I was beginning to feel self conscious about the spelling of my name when talking to him.)