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Parkinson's Disease
What Causes Parkinson's Disease?
Dopamine is a chemical messenger, or neurotransmitter.
Dopamine is responsible for transmitting signals between the
substantia nigra and multiple brain regions. The connection between
the substantia nigra and the corpus striatum is critical to
produce smooth, purposeful movement. Loss of dopamine in this
circuit results in abnormal nerve-firing patterns within the brain
that cause impaired movement.
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