I forgot to add this question to my last posting: my mother (67/a few months) has very limited mobility of her left hand. In fact, the weakening of that hand was her first noticeable PD symptom. She has no tremor at all except occasionally in that hand, but when it's in use. I know that the PD tremor is a resting one. Are there others with hardly any tremor but when they have it it's when it's in use?? Thanks. Debbie White