Researchers trace how different sleep stages may fine-tune what we remember, trading specifics for more general knowledge.

Scientists are providing a fuller understanding of the essential role that sleep plays in brain health, identifying an abrupt transition at about 2.4 years of age when its primary purpose shifts from ...

Using a neural network model, Penn neuroscientist Anna Schapiro and colleagues found that as the body moves between REM and slow-wave sleep cycles, the hippocampus and neocortex interact in ways that ...

If you’ve ever felt groggy after a full night’s sleep, you may not have gotten enough deep sleep, the most physically restorative stage of sleep. While REM sleep supports emotional processing and ...

This study examines how sleep influences memory, revealing the interplay between emotional cues and intentional recall in ...

Men with HIV and severe sleep-disordered breathing experience the greatest sleep disruption, with lower efficiency, more light sleep, and unstable sleep stages.

Young jumping spiders dangle by a thread through the night, in a box, in a lab. Every so often, their legs curl and their spinnerets twitch—and the retinas of their eyes, visible through their ...