Changes

'''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.

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

== Sources ==

== Sources ==