The first edition of Parkinson's Disease and Nonmotor Dysfunction was published in 2005 to provide a source of detailed information that could be readily accessed by the practicing physician. The widely praised first edition described and explained these nonmotor features that had at that point received insufficient attention both in the medical and in the lay literature. Since the publication of the first edition, awareness and knowledge of the nonmotor features of PD has dramatically expanded, calling for a new edition of this important title. Timely, fully updated and expanded,...