Dystonia is a condition in which muscles are abnormally tight, resulting in a sensation of “cramps” and often uncomfortable movements of the arms or legs, or twisting of the head and neck.  

Essential Tremor (ET) is a condition in which shaking of the hands, head & neck, and even voice may be present, and typically manifests during movement (unlike tremor in Parkinson’s Disease, which is more prominent at rest). 

Parkinson’s Disease is a common neurologic disorder whose cardinal symptoms are tremor at rest, slowness and stiffness.  In addition, many people with Parkinson’s have difficulty with walking due to problems with balance or “freezing,” have increased fatigue, difficulty sleeping, difficulty speaking, and problems with attention and cognition, especially in advanced disease.