How to differentiate cerebellar dysfunctions from basal ganglia dysfuntions?

Several ways: BG has resting tremor, Cerebellar has action tremor. Muscle tone up in BG, decreased in cerebellum. Gait ataxia if cerebellar, but short hesitant steps in BG. Just a couple ways that neurologists look at findings. If you think you might have one or the other problems, might consider a visit to a neurologist.

Yes: Somewhat easy for a trained neurologist, as different types of tremors, muscle tone, coordination, gait and balance, and our imaging studies, such as MRI and PET scans can separate out the location of the problems.