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What is Parkinson's disease?

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Quick Answer

Parkinson's disease is a condition that affects the nervous system, according to the Mayo Clinic. It is a chronic condition that gets progressively worse. It is unknown what causes Parkinson's disease, but the loss of dopamine-producing brain cells is a factor, and there is no known cure.

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Full Answer

The National Institute of Neurological Disorders and Stroke notes that there are four major symptoms of Parkinson's disease: an impaired balance and coordination, slowness of movement, trembling of the limbs and face and stiffness of the limbs and trunk. The disease usually strikes those over the age of 50 and begins with subtle symptoms that gradually worsen until they interfere with the ability to speak, walk and participate in daily activities.

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