A sleep doctor breaks down how much deep sleep we need by age, plus the 6 signs you're not getting enough ...

This sleep stage is incredibly important.

REM stands for rapid eye movement — a stage in the sleep cycle when your brain is almost as active as when you’re awake. Getting enough REM sleep is crucial, as it helps you store information and ...

This World Sleep Day, here is the science behind the different stages of sleep people experience through the night and why ...

A restful night alternates in cycles between non-rapid eye movement (NREM) and rapid eye movement (REM) sleep states. The study from UNIL shows that a brain region called the "locus coeruleus" (in ...

A new study shows that even a moderate dose of caffeine alters brain activity during sleep, increasing complexity and nudging neural systems toward a high-efficiency processing state, especially in ...

Add Yahoo as a preferred source to see more of our stories on Google. When you buy through links on our articles, Future and its syndication partners may earn a commission. In the past, scientists ...

In my last post, I asked, "Are you getting enough sleep?" Today, in an effort to better understand the role of sleep in our lives, I ask a very basic question: What happens when our heads hit the ...

For every 1 gram per kilogram increase in alcohol dose, REM sleep duration was reduced by 40.4 minutes. Alcohol consumption adversely affects rapid eye movement (REM) sleep in a dose-dependent manner, ...

Most creatures sleep, but until now, REM (rapid eye movement) sleep, the phase of sleep in which dreams occur, was thought to be exclusive to vertebrates. Octopuses appear to be the first ...