I'm not terribly worried about this, but I've spoken with my doctor (actually several doctors now, due to the revolving door the Central Peninsula Health Center has had for the position since I moved up here). He (they) have not seemed particularly concerned either, but will check with with me about it to see if it has progressed during my fairly regular visits.
Knowing that I have this problem (however mild it may be) makes me glad that I did not try to become a surgeon or some other job that required such careful precision. A little over a week ago, one of the screws fell out of my glasses unnoticed. After buying an eyeglass repair kit, I had to spend about half an hour trying to maneuver that new tiny screw into the correct position and screw it into place. The process was tremendously frustrating as I just couldn't seem to hold steady enough to do it. The more frustrated I became, the worse it got. I finally supported my entire arms on the bed by kneeling next to it, practiced deep breathing, and managed to accomplish the task.
Most of the time, such as at this moment, I do not have any difficulty. However, I've had to throw out a multiple attempts at classroom posters due to a sudden, unexpected twitch that ruins the effect I was trying to establish. As a person who practiced calligraphy in his youth, I find this quite disheartening.
I've been blessed with the control that I do have over my body for the time that I have had it. Hopefully, I will learn less to regret any loss of function or control and more to appreciate what abilities I still retain as time goes on. In D&D terms, I should be getting bonuses to my intelligence, wisdom, and charisma ... so that's something to look forward to.