I think all of us are familiar with Linda Ronstadt and her songs that went from rock to a little bit of country. Here's how Parkinson's Disease silenced her. http://energytimes.com/pages/features/0117/linda.html
In her appearance at the Tilles Center, Ronstadt, 70, did not appear to have any of the tremors typically associated with Parkinson’s disease, but she did appear to show some stiffness in her face and lacked affect.
“Having seen Parkinson’s up close—my mother-in-law had Parkinson’s for 18 years—I was able to see how it affected a person,” said John Pratt, who interviewed Ronstadt on stage and is host of “Sunday Supper” on WFUV at New York’s Fordham University.
“There is a kind of, sometimes they call it a mask, that a Parkinson’s patient has, where there’s not as much facial expression, and I think to some extent that’s true of Linda.
But she still has those beautiful big brown eyes that sparkle and such a ready smile that’s warm and makes you feel comfortable in her presence.”