Sleep problems are among the major, challenging issues in patients with Parkinson’s disease (PD), affecting a significant number of patients. Sleep problems are multifactorial, including disease-related nocturnal symptoms, restless legs syndrome, rapid eye movement sleep behavior disorder, and sleep apnea syndrome. Also, some patients exhibit excessive daytime sleepiness. Assessment of disease-related nocturnal disturbances and primary sleep disorders is clinically important. We would like to invite investigators to contribute original research articles and review articles for a current understanding of sleep problems in PD.

Potential topics include, but are not limited to:

• Nocturnal problems in PD
• Restless legs syndrome in PD
• Excessive daytime sleepiness in PD
• Rapid eye movement sleep behavior disorder in PD
• Sleep apnea syndrome in PD