Parkinson’s disease is a common, slowly progressive, neurodegenerative disease. It results from the degeneration of neurons in the substantia nigra, a region of the brain that controls movement. This degeneration results in a shortage of a neurotransmitter called dopamine, therefore, causing impaired movement. The first symptoms of the disease are usually seen later in life, 40 years or older. Parkinson’s disease is often called primary parkinsonism or idiopathic Parkinson’s Disease to distinguish it from other forms of parkinsonism.
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