Parkinson’s disease is a chronic neurological disease that in most cases affects people over 55 years of age. The disease is characterized by symptoms such as tremor, rigidity and slowness of movements, and is caused by a decrease of dopamine in the brain. Dopamine is a neurotransmitter used in the brain to send signals between brain cells. When dopamine levels decrease, the brain this control of nerve signals and body movements is lost.
The disease is progressive, which means that it is aggravated over time. Men suffer more often from the disease than do women.