Sleep disorders in Parkinson disease

Parkinson disease is a progressive degenerative disease causing motor and non-motor symptoms. Sleep disturbance is a common non-motor symptom and significantly affect the day to day activities of patients and their quality of life. Though common, sleep disturbance is an under diagnosed feature of Parkinson disease (PD). Night-time sleep disturbances have been reported in as many as 60 to 98% of patients with Parkinson disease1,2. Patients with Parkinson disease have more complaints of sleep disturbances and poor quality of sleep than age matched controls2,3,4. In addition to night time sleep disturbances about 50% of Parkinson patients also complain of increased excessive day time sleepiness compared to age matched controls5,6,7. Sleep disturbances in Parkinson disease may be due to the disease or secondary to medication. Associated conditions like depression and age related disorders also play a role in sleep disturbances in these patients.