Parkinson's disease is an illness that affects the part of your brain that controls how you move your body. Some people with Parkinson’s first notice weakness, difficulty walking, and stiff muscles.

A longstanding mystery in Parkinson's disease research has been why some individuals carrying pathogenic variants that ...

For decades, Keith Krehbiel took high doses of medications with a debilitating side effect—severe nausea—following his diagnosis with early-onset Parkinson’s disease at age 42 in 1997.