When you’re short on sleep and your focus suddenly drifts, your brain may be briefly slipping into cleanup mode. Scientists ...

One key role of sleep involves cerebrospinal fluid, which surrounds and protects the brain. During sleep, CSF helps remove waste that accumulates during waking hours. In a 2019 study, Lewis and her ...

REM sleep goes even deeper into brain recovery, dreaming and processing memories and emotions. This is the sleep stage in ...

You can see it coming in right there, that little spot,” says neuroscientist and engineer Laura Lewis. A remarkably bright pulsing dot has appeared on the monitor in front of us. We are watching, in ...

A new study by scientists at the Massachusetts Institute of Technology (MIT) sheds light on how lack of sleep affects the ...

The timing of your sleep patterns could be linked to increased dementia risk, according to a new study. Each person's circadian rhythm, often defined as the body's internal 24-hour clock, keeps the ...

Findings from Mass General Brigham investigators highlight the intricate interplay of diverse physiological processes as the brain shifts from wakefulness to sleep. A new study by investigators from ...

Sleep is a universal biological state that allows all animals, from mammals to amphibians, fish and even insects, to restore ...

Cutting off caffeine earlier in the day may change more than just your sleep quality.