HOUSTON — A good night’s sleep is important for both the body and brain. It’s essential to understand the four stages of sleep and how to get more restful z’s. Stage 1: Transitional sleep The sleep ...

“Essentially, the brain loses its ability to regulate emotions effectively, making us more irritable, anxious, or prone to ...

The risk of getting dementia may go up as you get older if you don't get enough slow-wave sleep. A 2023 study found that over-60s are 27 percent more likely to develop dementia if they lose just 1 ...

Sleep Cycles: One rapid eye movement (REM) stage and three non-REM stages that altogether last about 90 to 120 minutes Benefits: Physical and mental recuperation and memory consolidation Disorders: ...

ATLANTA — Need another reason to prioritize your sleep? Not spending enough time in the two deep stages of sleep — slow-wave and rapid eye movement, or REM, sleep — may hasten the deterioration of ...

Getting enough quality sleep is essential to strong memory function. Understanding the sleep-memory connection may help you learn to prioritize sleep and improve your memory.

Deep sleep refers to slow-wave sleep — a stage in the sleep cycle when brain waves slow down. Getting enough deep sleep is crucial for numerous bodily functions. But how to increase deep sleep isn’t ...

Sign up for CNN’s Sleep, But Better newsletter series. Our seven-part guide has helpful hints to achieve better sleep. When jolted awake by the blare of an alarm ...

A late night's sleep can cause a range of immediate effects the following day that go well beyond a simple yawn.