Sleep disorders in Parkinson's disease

Sleep disorder are common non-motor symptoms in Parkinson`s disease (PD). They can be found in different sleep stages or appear during the daytime. They correlate with faster progression of motor problems and lower quality of a patient's life. Sleep physiology, different sleep dysfunction such as: RBD-REM sleep behavior disorder, EDS - excessive daytime sleepiness, insomnia, OSAS-obstructive sleep apnea syndrome, and their clinical manifestation have been presented in this review. Diagnostic and therapy possibilities have been summarized as well. Particular attention has also been paid to the coexistence of various non-motor symptoms such as pain, depression or nocturia, and their correlations with sleeping problems.