Nonmotor complications in Parkinson's disease

Parkinson's disease (PD) is most often considered a disorder of movement. Whereas bradykinesia, rigidity, tremor, and postural instability result in disability, nonmotor complications in PD may be of equal or greater significance in some patients. This review will discuss many of the nonmotor complications in PD, including cognitive, autonomic, sleep, and sensory difficulties that may occur. (c) 2005 Movement Disorder Society.