Parkinson disease is a brain disorder. It occurs when certain nerve cells (neurons) in a part of the brain called the substantia nigra die or become impaired. Normally, these cells produce a vital chemical known as dopamine. Dopamine allows smooth, coordinated function of the body's muscles and movement. When approximately 80% of the dopamine-producing cells are damaged, the symptoms of Parkinson disease appear.
Web : http://www.parkinsondisease.in/
The loss of dopamine production in the brain causes the primary symptoms of Parkinson disease. The key signs ofParkinson disease are:
- Tremor (shaking)
- Slowness of movement
- Rigidity (stiffness)
- Difficulty with balance
Other signs of Parkinson disease may include:
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