Parkinson's disease (PD) is a chronic and progressive movement disorder, meaning that symptoms continue and worsen over time. The cause is unknown, and there are treatment options to manage its symptoms.
Parkinson's primarily affects neurons in an area of the brain called the substantia nigra. Some of these dying neurons produce dopamine, a chemical that sends messages to the part of the brain that controls movement and coordination. As PD progresses, the amount of dopamine produced in the brain decreases, leaving a person unable to control movement normally.1
Primary motor signs of Parkinson’s disease includes tremor of the hands, arms, legs, jaw and face; bradykinesia or slowness of movement; rigidity or stiffness of the limbs and trunk and postural instability or impaired balance and coordination.1