Parkinson's is a progressive neurological condition affecting movements such as walking, talking, and writing. It is named after Dr. James Parkinson (1755-1824), the London doctor who first identified Parkinson's as a specific condition. Parkinson's occurs as result of a loss of nerve cells in the part of the brain known as the substantia nigra. These cells are responsible for producing a chemical known as dopamine, which allows messages to be sent to the parts of the brain that co-ordinate movement. With the depletion of dopamine-producing cells, these parts of the brain are unable to function normally.
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