Our date of birth doesn't always match the age of our brain. How old our brain really is depends on our biological age, shaped by the wear and tear our cells experience over time. Genetics, ...

A recent study in rats suggests that during the rapid eye movement (REM) phase of sleep, the brain uses repeating chains of rapid electrical waves to organize and replay memories in a highly specific ...

Sleep does not isolate the brain from the world—rather, it affects how the brain balances the processing of different types of sensory information. A Swiss study shows that as we drift off to REM ...

Low oxygen during REM sleep damages memory centers in the brain through injury to small blood vessels, according to new research. This finding explains why many sleep apnea patients develop cognitive ...

We spend nearly a third of our lives asleep, yet sleep is anything but wasted time. Far from being passive downtime, it is an active and essential process that helps restore the body and protect the ...