Parkinson's disease is a degenerative disorder of the nervous system that affects millions of people worldwide. Named after Dr. James Parkinson, who first identified it in 1817, Parkinson's disease primarily affects the neurons that produce dopamine in the brain. As a result, people with Parkinson's disease experience a variety of motor and non-motor symptoms that progressively worsen over time. The exact cause of Parkinson's disease is unknown, although there are several factors that have been implicated. Genetics, environmental toxins, and aging are all thought to play a role in the development of Parkinson's disease. People with a family history of the disease are more likely to develop it themselves, and exposure to certain chemicals and toxins has been linked to an increased risk of Parkinson's disease. The hallmark symptoms of Parkinson's disease are tremors, stiffness, and difficulty with movement. People with Parkinson's disease often experience ...