Parkinson’s disease (PD) is a type of neurologic movement disorder, affecting the brain and causing difficulty with movements, or motor symptoms.
It is characterized by its most common motor symptoms — tremors (a form of rhythmic shaking), stiffness or rigidity of the muscles, and slowness of movement (called bradykinesia) — but also manifests in non-motor symptoms including sleep problems, constipation, anxiety, depression, and fatigue, among others, which can be present well before any visible motor symptoms. It is a chronic and progressive condition, meaning that the symptoms become worse over time and can affect the ability to perform common, daily activities.
There are an estimated 1 million people in the U.S. living with Parkinson’s disease and more than 10 million people worldwide. Most people who develop the symptoms of Parkinson’s disease do so sometime after the age of 50, but Parkinson’s disease can affect younger persons as well. Approximately 10% of Parkinson’s diagnoses occur before age 50—these diagnoses are called Young Onset (or Early Onset) Parkinson’s disease.
