It's weird how you end up re-evaluating every tiny movement, isn't it? I'm currently exploring that with my shoulder (one acute injury, one chronic but only discovered when the acute one was examined) - can I brush my hair with my right hand? Yes. Should I? No, because it takes a split second to move my arm just that little bit too far and wreck my entire arm for the next 5 minutes... so I'm learning to do that left-handed, just in case. :D