Zeroing in on Parkinson’s: Researchers take multifaceted approaches to brain disease

For centuries, scientists have tried to crack the mystery of a devastating ailment once called “the shaking palsy.” But Parkinson’s disease, which causes tremors, muscle stiffness and difficulty walking, remains the second most common neurodegenerative disorder in the United States after Alzheimer’s. About 1 million Americans have Parkinson’s, and more than 50,000 new cases are diagnosed annually.