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Parkinson is a disease that affects the nervous system and is caused by reduction in the substance called dopamine, creating an imbalance with other substances (acetylcholine). This provokes confusion in the nerve impulses that control the muscles and produces oscillatory muscular movements (shaking) mainly in the hands and head.
Symptoms: The symptoms of the disease are repeated involuntary circular movements in the hand and head, contractions, difficulty in speaking, stern facial expression and in some occasion loss of appetite.
Causes: The causes of this kind of illness are not well known, however it is known that the lack of secretion of dopamine, simple organic chemical found in brain, by certain brain cells is one of them.