There is growing recognition in the medical profession today that the nonmotor features of Parkinson's Disease (PD) have received insufficient attention, are frequently present in these patients, and can be the source of considerable discomfort and disability for the affected individuals. In Parkinson's Disease and Nonmotor Dysfunction, an outstanding panel of clinicians and scientists provides detailed clinical descriptions and treatment recommendations for these important, but often unrecognized, features of PD. Topics range from behavioral abnormalities and autonomic dysfunction to sleep-related and sensory dysfunction, and include depression, anxiety, dementia, psychosis, obsessionality, gastric and intestinal dysfunction, impaired sexual function, insomnia, excessive daytime sleepiness, and sleep apnea. Attention is also given to several problems (oculomotor dysfunction and fatigue) that tread on, or perhaps cross over, the line between motor and nonmotor dysfunction in PD. The authors review what is known about each type of dysfunction, discussing clinical features, methods of diagnosis, and treatment. Comprehensive and practical, Parkinson's Disease and Nonmotor Dysfunction offers movement disorder specialists up-to-date guidance on all the nonmotor features of Parkinson's Disease and possible treatments.