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Substantia nigra and Parkinson's disease

Parkinson's disease is a slowly progressive disorder that affects movement, muscle control, and balance. Part of the disease process develops as cells are destroyed in certain parts of the brain stem, particularly the crescent-shaped cell mass known as the substantia nigra. Nerve cells in the substantia nigra send out fibers to tissue located in both sides of the brain. There the cells release essential neurotransmitters that help control movement and coordination.

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Definition Alternative Names Causes, incidence, and risk factors Symptoms Signs and tests Treatment Support Groups Expectations (prognosis) Complications Calling your health care provider References

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