Parkinson’s occurs when certain nerve cells (neurons) in a part of the brain called the substantia nigra die or become impaired. Normally, these cells produce a vital chemical known as dopamine. Dopamine allows smooth, coordinated function of the body’s muscles and movement. When approximately 70% of the dopamine-producing cells are damaged, the symptoms of Parkinson’s disease appear.
Parkinson’s New South Wales provides a useful introduction about Parkinson’s Disease
An excellent publication with a lot of detail that you may download is a Guide to living with Parkinson’s Disease
Parkinson’s Western Australia has satin inserts for bed sheets
Further advice on Parkinson’s Disease, associated research and various support groups may be obtained from Parkinson’s New South Wales.