What is Parkinson's disease?
A person with Parkinson's disease has a nervous system disorder that results in damage to the part of the brain that controls body movement and coordination. The exact cause of Parkinson's disease is unknown. Heredity, infections, and exposure to chemicals may play a role. More than one million people in the US have Parkinson's disease.

What are the symptoms of Parkinson's disease?
The initial symptoms of Parkinson's disease include a tremor that is worse while at rest and improves during movement. Other symptoms include rhythmic back-and-forth motion of the thumb and forefinger, slow movement, muscle stiffness, limbs that are rigid and resistant to movement, loss of facial expression, shuffling gait, drooling, difficulty swallowing, a tendency to remain in one position, depression, dementia, confusion, and hallucinations.

How does the doctor treat Parkinson's disease?
Treatment for Parkinson's disease includes physical therapy, occupational therapy, speech therapy, a special diet, and medications that control symptoms. Additional treatment for Parkinson's disease may include surgery to implant a deep brain stimulator.