Parkinson’s Disease, Can its Course be Altered? Dr. Williamson What is Parkinson’s? Parkinson’s is a chronic and progressive degenerative disease of the neurological system. It involves continuous degeneration of the dopaminergic neurons of the substantia nigra pars compacta. In simple terms, a portion of the brain begins to degenerate and … [Read more...] about Parkinson’s Disease. Can the Course be Altered?