books.google.ca - Parkinson's disease (PD) is characterised by an insidious onset with slowing of emotional and voluntary movement, muscular rigidity, postural abnormality and tremor. Parkinson's disease was first described in 1817 by James Parkinson. It is a progressive, neurological disease mainly affecting people over...http://books.google.ca/books/about/Parkinson_s_Disease.html?id=4YSE9MUf2SIC&utm_source=gb-gplus-shareParkinson's Disease
