jaretktm99
jaretktm99
16-02-2017
Health
contestada
what are some good causes for parkinsons disease
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abbyperry0114
abbyperry0114
16-02-2017
caused
by the progressive impairment or deterioration of neurons (nerve cells) in an area of the brain known as the substantia nigra. When functioning normally, these neurons produce a vital brain chemical known as dopamine.
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