Since my 2 Re-Stenosed "Liberations" in 2010, in Lingen (Germany), on FIVE 80-90% stenoses, in Both Jugulars and Brachiocephalic veins, I notice a difference in (reflux ?)-bloodflow of De-Oxigenized blood, during Sleep, while in HORIZONTAL position, ( for many hours, every night).

I wonder (Suspect) if Chronic HYPOXIA, HYPOXEMIA, HYPOPERFUSION of De-Oxigenized blood is a possible cause of MS and De-Myelination in our brains