Parkinson's disease
Read about Parkinson's disease, a condition in which parts of the brain become progressively damaged over many years.
The symptoms of Parkinson's disease usually develop gradually and are mild at first.
Parkinson's disease is caused by a loss of nerve cells in the part of the brain called the substantia nigra.
No tests can conclusively show that you have Parkinson's disease. Your doctor will base a diagnosis on your symptoms, medical history and the results of some simple exercises.
There's currently no cure for Parkinson's disease, but treatments are available to help relieve the symptoms and maintain your quality of life.
A diagnosis of Parkinson's disease is life changing. You will need long-term treatment to control your symptoms.
Parkinson's disease is usually considered to be an older person's illness, but Karen Rose was diagnosed with it when she was just 34.
Ernie May was diagnosed with Parkinson's when he was 65. He tells us his story.