Parkinson’s disease is a chronic movement disorder caused by the failure and death of vital nerve cells in the brain. These cells are called neurons. They are responsible for producing dopamine, a chemical that sends messages to the part of the brain that controls movement and coordination. The amount of dopamine produced in the brain decreases as Parkinson’s disease progresses, leaving a person unable to control movement normally.
Parkinson’s disease usually affects people over the age of 50.
The early symptoms of Parkinson’s disease are subtle and occur gradually, sometimes starting from a barely noticeable tremor in one hand. These symptoms worsen over time.