I am a caregiver for my dear friend (66/4) Muriel. She has been diagnosed with Parkinsonism (possibly striatonigral degneration). Lately she has been much troubled with her fingers closing on her hand so that she has a fist instead of an operating hand. This makes it difficult to hold anything. When she tries to pry open her fingers she has considerable pain and difficulty.She is wondering whether the problem is arthritis or a Parkinson problem. Does anyone have any knowledge or experience with this problem. Any information would be greatly appreciated. Thank you for your thoughts. David Silverman