Dopamine neurons—the cells that drive reward and motivation while we're awake—become surprisingly active during nonrapid eye movement sleep right after we learn something new. The findings challenge ...

Caffeine doesn't just make it harder to fall asleep; it changes how the brain behaves during rest. New research shows that caffeine alters brain activity in ways that make sleep look more like ...

The idea of losing weight while you sleep might seem like a dream, but research suggests it's more than possible. The ...

Research once viewed sleep as a passive state of “nothingness,” but modern neuroscience has revealed it to be a highly active, complex, and essential biological process. Far from being “down time,” ...

A poor night's sleep portends a bleary-eyed next day, but it could also hint at diseases that will strike years down the road. A new artificial intelligence model developed by Stanford Medicine ...

Your brain’s natural rinse cycle flows while you sleep. A new study suggests certain medications interfere with that important nightly ritual. Researchers record brainwaves along with muscle and eye ...

In 1959, New York DJ Peter Tripp became a test subject for sleep’s effects. His 201-hour wakeathon made him see spiders in his shoes and question his identity. This shows why sleep is essential, not ...

Stanford researchers have developed an AI that can predict future disease risk using data from just one night of sleep. The system analyzes detailed physiological signals, looking for hidden patterns ...

People report vivid dreams during rapid-eye-movement sleep. But is this sleep stage really the only time we dream? When you purchase through links on our site, we may earn an affiliate commission.