I'm the same as you bro... But I was diagnosed with an essential tremor, which is basically harmless and hereditary. Test actually helps with this, as does diet, but supposedly it is related to dopamine production and utilization as well.
Scary thing is my grandfather died of a "parkinsons-like disease" (thats all I know), but the doctors said his was a result of contracting the spanish flu when he was young.
Some are now referring to alzheimer's as "Type 3 diabetes," so I wonder how this might relate to carb/insulin control with parkinsons as well, both being degenerative diseases...