Parkinson's is one of the chronic diseases. Everyone with Parkinson’s has different symptoms, but the most common symptoms are tremor, muscle rigidity and slowness of movement. All of these are related to movement and are called motor symptoms. Many people with Parkinson’s also experience other problems not related to movements, such as pain, anxiety, and depression. These are called non-motor symptoms. Our movements are controlled by nerve cells in the brain which pass messages to one another, and to the rest of the body, using chemicals called neurotransmitters. An area of the brain called the substantia nigra produces one of the neurotransmitters that control movement: dopamine. In people with Parkinson's 70-80% of dopamine-producing cells gradually deteriorate and are lost.
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