Parkinson's disease

"Parkinson's disease" is the name of a disease which affects a person's brain and nerves. It sometimes causes the person's movements to become shaky. One well-known person who has Parkinson's disease is the actor Michael J. Fox, who starred in the 1980's movie Back To The Future.

When people talk about this disease, sometimes they just call it "Parkinson's":

I heard she had Parkinson's.

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