Non-motor Symptoms and Treatments in Parkinson's Disease.

Parkinson's disease (PD) is a neurodegenerative disorder characterized by motor and non-motor symptoms. The non-motor features may precede the onset of motor symptoms and occur throughout all stages of PD. The non-motor symptoms reflect multisystem involvement of the central and peripheral nervous systems, multiple neurotransmitters, and multiple pathologies. PD management necessitates a comprehensive approach to address non-motor symptoms, including pharmacologic and non-pharmacological interventions and often multiple different disciplines or specialists in the PD care team. This review article discusses symptoms and treatments for the non-motor symptoms of PD including those affecting mood, cognition, behavior, sleep, autonomic function, and sensory systems.