Here are a few links to articles that look at the effects of Deep Brain Stimulation (DBS) on sleep, and daytime drowsiness, which could be a side effect from poor sleep. Or it could be something else.
Long term effects of DTN DBS on sleep
10 year study on daytime drowsiness and PD
REM Sleep Behavior Disorder is one of the more highly correlated conditions that end up with Parkinson’s.I remember having to spend the night on the floor of a motel when traveling with the college marching band. I was dreaming about a girl, and reached out to put my arm around her, waking the guy who was sharing the queen bed with me. It’s funny, now. I’ve had worse dreams. Still act out some of them. Which as a lead-in to:
The largest clinical investigation to date of Prodromal Parkinsonism and Neurodegenerative Risk Stratification in REM Sleep Behavior Disorder
Abstract from a chapter in a book on sleep disorders:
Significant progress has been made in understanding the pathophysiology of sleep and wake disruption in alphasynucleinopathies during the past few decades. Despite these advancements, treatment options are limited and frequently associated with problematic side effects. Further studies that center on the development of novel treatment approaches are very much needed. In this article, the author discusses the current state of the management of disturbed sleep and alertness in PD and MSA. © 2017 International Parkinson and Movement Disorder Society (emphasis added)
accessed at this link:
Management of sleep disorders in Parkinson’s disease and multiple system atrophy
As someone once wrote: To sleep, perchance to dream…
bob's brain: living well with a movement disorder and other comorbidities 