ABOUT PARKINSON'S DISEASE: This is a degenerative disorder of the central nervous system, first described by English apothecary James Parkinson in 1817. Symptoms include muscle rigidity, tremors, slowing physical movement, and can progress to loss of physical movement. Essentially, the problems are caused by issues with the production and action of dopamine within the brain. It can also cause cognitive problems and many other symptoms. The cause of the disease is not well understood, but genetics, toxins, head trauma, and others factors may be involved.