Parkinson’s disease is a brain disorder that leads to shaking, stiffness, and difficulty with walking, balance, and coordination. The average age of onset is 60 years, and the risk of developing Parkinson’s goes up with age. Parkinson’s symptoms usually begin gradually and get worse over time.
Click here for more information. http://nihseniorhealth.gov/parkinsonsdisease/whatisparkinsonsdisease/01.html