It is a chronic, progressive movement disorder in which symptoms continue and get worse with time. Parkinson’s is characterized by death of essential nerve cells/neurons. This disease primarily affects neurons in the susbstantia nigra area of the brain. Few of the dying neurons produce dopamine, which sends messages to that part of the brain which controls movement and co-ordination. As the disease progresses, the amount of dopamine in the brain decreases leaving the individual unable to control movement in a normal manner.