'''Parkinson's disease''' is a common progressive neurological disorder that results from degeneration of nerve cells in a region of the brain that controls movement. The first symptom of the disease is usually tremor of a limb, especially when the body is at rest.
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'''Parkinson's disease''' is a common progressive [[neurological]] [[disorder]] that results from [[degeneration]] of [[nerve]] cells in a region of the [[brain]] that controls movement. The first symptom of the disease is usually [[tremor]] of a [[limb]], especially when the body is at rest.