Get the facts on Parkinson's Disease with this 100%-accurate animated video. Part of Focus Apps' Understanding Disease: Neurology series, the Parkinson's Disease app demonstrates this progressive neurological disorder, which is characterized by tremors, debilitated muscular coordination, weakness, and posture instability. Parkinson's disease is caused by a degeneration of dopamine cells in the movement-control centers of the brain. Explore its causes, classical symptoms, pathophysiology, diagnosis, and treatment.