Parkinson's disease is classified as a bug in a group of neurons, a disorder of the central nervous system in the voluntary or movement disorders motion system, resulting in the absence of a chemical in the brain called dopamine progresses slowly in most people means that the symptoms of the disease getting worse with the progress in age stages . He is also the nerve cells die in some parts of the brain or weaken over time. With age, increase the proportion of loss of motor cars in the brain. The disease was named after the name of the English physician James Parkinson