A recent study observed sleeping participants' pupils during sleep, using a new method that could have implications for ...

ETH Zurich researchers found that pupil size changes during sleep, indicating shifts in brain activity. This could help ...

A new study reveals that pupil size fluctuates constantly during sleep, reflecting changes in brain activation levels.

When you’re in a period of REM sleep, your eyes will rapidly move from side to ... noise by closing any windows that may still be open, for example. And thirdly, make sure your bed including ...

REM sleep goes even deeper into brain recovery, dreaming and processing memories and emotions. This is the sleep stage in which your eyes move rapidly. If you've ever caught your dog or cat in a ...

The next thing you know, your eyes open and you wake up ... when you’re awake and when you’re in rapid eye movement (REM) sleep. People with narcolepsy often don’t have as many brain ...

(REM sleep is a stage of sleep where your eyes move quickly and you dream, per the Cleveland Clinic. It’s important for learning and memory, too.) Of the participants, 64 had Alzheimer’s ...

explaining that "scientists divide sleep into two major types: REM (rapid eye movement) sleep or dreaming sleep, and non-REM or quiet sleep. Surprisingly, they are as different from each other as ...