Gosh yes! I'd LOVE to know. I can't get more than 4 or max 5 hours broken sleep these days, and that alone would ruin a healthy person! I was ill enough at the start sleeping lots like your wife, and waking up unrefreshed.
I've read a lot about the effect of frank sleep deprivation like mine. And it's depressing. Long term it can cause neurological problems such as Alzheimers, dementia, maybe Parkinson's too, can't remember, (my memory is messed up - definitely a lack of sleep side effect, together with increases in pain, headaches, mood disorders, digestion problems...)
The neurological illnesses are due to damage by waste products - adenosine - that accumulate while awake and can only be disposed of during sleep.
So for those ME patients SEEMINGLY getting enough hours sleep, but waking up feeling like they've not slept, I wonder if this cleaning system is malfunctioning? If I remember correctly, cerebrospinal fluid washes the adenosine away, and they recently discovered a also a special brain branch of the lymphatic system that helps too.
I think this contributes to the horrendous "poisoned" feeling so many of us talk about. For me, it results in a migraine. The apotheosis of total-body poisoning from full brain overload poison, my stomach, guts, ugh... Non-cleaning of adenosine out of the brain!
From using energy in the brain. Not enough lying in a dark room eyes shut, no noise.
I'm free-running now. My brain is too tired. But adenosine is part of the energy process. Someone please take over
