Increasingly, during the past year, raising my right arm against pressure has caused the movement to come in short, jerky segments. My neuro referred to them as "cogwheel rigidity or ratcheting). She explained that, each time a muscle contracts, another opposing muscle must relax to let desired movement occur. In PWP the messages become confused and the muscles oppose each other causing a "ratcheting", jerky reaction over which the PWP has litle control. It causes no problem in handling a 2 0z. teacup, but can turn a 16 pound bowling ball into a dangerous missile.
I'M sure the above is not "news" to most of you, but I had not heard the term. I was hoping that someone may have found an exercize or a medication which might provide some control. Bowling is the last remnant of "Life before Parkie" and I hate to give it up, although it is a very minor problem compared to most.
Wishing you all well.