Usually, the diagnosis is established on clinical grounds.<unk> s can start at any age, from birth through advanced ages (senile<unk> . Any voluntary muscle in the body may be affected, although the<unk>  is most commonly seen in the hands and arms and slightly less commonly in the neck (causing the person's head to shake), tongue, and legs. A resting<unk>  of the hands is sometimes present.<unk>  occurring in the legs might be diagnosable as orthostatic<unk> .<unk>  occurs within multiple neurological disorders besides Parkinson's disease. This includes migraine disorders, where co-occurrences between<unk>  and migraines have been examined.
Essential tremor
Dystonia
Holmes tremor
Intention tremor
Myoclonic dystonia
Multiple sclerosis
Focal dystonia
Parkinson's disease