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What Is Parkinson's Disease?

Parkinson's disease is a brain disorder that causes a gradual loss of muscle control. The symptoms of Parkinson's tend to be mild at first and can sometimes be overlooked. Distinctive signs of the disease include tremors, stiffness, slowed body movements, and poor balance. Parkinson's was originally called a "shaking palsy," but not everyone with Parkinson's has a tremor.


http://www.webmd.com/parkinsons-disease/ss/slideshow-parkinsons-overview