Hi, almost bet you were doing some handwork during that issue stretching your palm (even holding a heavy thing is enough). This condition is ususally called spasmophilia, and it can happen at various conditions, mostly in two cases: if you have quite low Ca due to parathyroid glands troubles or other conditions, or if your muscles are hyperexcited (ulitmate form of spasmophilia could be seen in tetanus, for example, when even slightest movement causes severe spasms. Epilepsy is another cause of spasmophilia, but generally it is not considered as dangerous even in people with parathyreoiditis.People with spasmophilia often complain that any simple movement of palm causes middle fingers coming to the palm. I do have it, I think due to bot low Ca and hyperexcitation, and this year it was so prominent that my foot was really painfully jerking just because I was trying to put a shoe on, etc.I would like to say that for whatever reason it happened to you, in no way it is Parkinson symptome. Parkinsonic people have troubles with starting movement, they have frequent very specifc tremors (I'we seen them in the course I was taking online), postural rigidity, etc. - but not sudden spasms like in spasmophilia.