During REM sleep, blood flow increases while energy inside neurons drops, revealing a surprising paradox linked to vivid ...

A recent study published in Communications Biology provides evidence that the brain manages its energy resources in ...

A REM sleep study shows the brain turns inward, responding more strongly to heartbeats than sounds while we dream.

Share on Pinterest Researchers have found that obstructive sleep apnea severity during the REM stage of sleep negatively impacts verbal memory. SolStock/Getty Images Obstructive sleep apnea (OSA) ...

Sleep is one of the most widely studied states of consciousness, known to play a role in physical recovery, the processing of memories and the regulation of immune functions. During sleep, the brain ...

Scientists have recently shown that both the quality and the amount of sleep we get may influence our risk of developing Alzheimer's disease. Scientists have recently shown that both the quality and ...

"I have to get my deep REM sleep," expresses a common confusion about two very different types of sleep. Deep sleep and rapid eye movement (REM) sleep are not the same; they do not even overlap. They ...

It can be tough to calculate exactly how long you’re in REM, but many health trackers use your heart rate, heart rate variability, and data on your movements to make solid estimations. (Just know that ...

REM is the sleep cycle stage when dreaming occurs. Rapid eye movement "dream sleep" occurs cyclically about every 90 minutes in between the other "dreamless" stages of non-REM (NREM) sleep. Source: ...

A new population study links poor sleep quality, not just short hours, to cognitive decline.