The primary symptoms and signs are the most important and noticeable. The signs and symptoms usually begin gradually, slowly and often in no set order. Everyone with Parkinson disease experience the disease in a different way. Parkinson disease is all related to voluntary and involuntary motor function and usually start on one side of the body but as the disorder progress, it will affect the entire body. Studies have shown that by the time an individual has primary symptoms with Parkinson's disease will have lost between 60 and 80 percent or more of the dopamine-producing cells in the brain. Primary symptoms of Parkinson's disease include tremor, bradykinesia, stiffness and postural instability. The secondary symptoms of parking are less obvious
