Sleep looks peaceful on the outside, but inside the brain, it is anything but ...

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

Researchers monitored the activity of around 2,000 adults for three years. A new study from the American Academy of Neurology ...

Inside the body, a 24-hour rhythm, known as the circadian rhythm, quietly coordinates when we sleep, wake, eat and recover.

Circadian rhythms that are weaker and more fragmented are linked to an increased risk of dementia, according to a new study published on December 29, 2025, in Neurology ®, the medical journal of the ...

Elevated dementia risks among older adults were associated with weaker and more fragmented circadian rest-activity rhythms ...