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Nancy Mullen asked what is the difference between parkinsonism and Parkinson's. I believe that parkinsonism refers to anything that looks like the symptoms of Parkinson's; these symptoms may or may not be caused by Parkinson's. For example, someone may be experiencing diskynesia (although they may not know that's what it's called) and goes to a doctor. The doctor recognizes this as a form of parkinsonism; further tests might show it's caused by a stroke, or head injury, or actually by Parkinson's. To sum up, I believe that everyone with Parkinson's shows signs of parkinsonism, but not everyone with parkinsonism has Parkinson's. I hope this is clear. (I also hope it's accurate -- someone who's more expert than I might want to confirm what I've written.) Charlie Barasch