There was a question here about hand tremors that were non-Parkinsonian. I will not be able to find it, of course, but here is some accurate medical information.
No joking matter, BTW.
http://www.nlm.nih.gov/medlineplus/ency/article/003192.htm
Got it. BRi_L asked about Essential Tremors
My father had Parkinson’s and had no tremors, just terrible stiffness and trouble walking and changing directions (and eventually severe restless legs that made sleeping difficult.)