I strongly recommend that all you PDers get tested for sleep apnea. In apnea, one stops breathing during sleep for a short time, thereby depriving the body of much needed oxygen. It can be the cause or a contribution to a lot of serious conditions.
Apnea is divided into two parts, obstruction (where tongue, sinuses, etc. interfere with breathing in a lying down position and central apnea where the brain doesn't send proper signals to the muscles telling you to breathe. Seems PDers might be vulnerable on both counts. There aren't a lot of studies on a connection but just think about it. The parkinsons foundation suggest that perhaps 40% of PDers have apnea. When is the last time your doctor suggested getting tested for it in spite of the fact that you are fatigued during the day (that's just PD, don't you know) or that you pee too frequently during the night (also just PD, don't you know) or that your vascular system isn't doing so well? My guess is NEVER!
One does NOT have to snore to have apnea. One does not have to be fat to have apnea. The initial test is easy...an overnight finger monitor.
Strongly suggest you all download the free book called Sleep, Interrupted by Steve Park, MD. Easy to read and well worth it.
Get tested. Good if you don't have it but if you do, there is help for you. The new masks are loads better than the old ones and covered by insurance. They record wirelessly and you can check your improvement on your computer each day to know what adjustments you need to make. Just using oxygen doesn't do it...air pressure is required.