Archive: https://archive.today/tWFlW From the post: >>Research from Toronto has shown for the first time that fragmented sleep causes damage at the cellular level to the brain’s blood vessels, providing further evidence to suggest sleep disruption predisposes the brain to dementia. “We found that individuals who had more fragmented sleep, such as sleeping restlessly and waking up a lot at night, had a change in their balance of pericytes — a brain blood vessel cell that plays an important role in regulating brain blood flow and the entry and exit of substances between the blood and the brain,” said Andrew Lim, principal investigator of the study and a sleep neurologist and scientist at Sunnybrook Health Sciences Centre