This video segment adapted from NOVA scienceNOW considers the purpose of sleep and, in particular, the connection it shares with memory. By studying the dreams of rats, researchers are hoping to gain ...

While it's well known that sleep enhances cognitive performance, the underlying neural mechanisms, particularly those related to nonrapid eye movement (NREM) sleep, remain largely unexplored. A new ...

In the last several years, books and articles have increasingly drawn attention to the key role of sleep in preserving good health. In the long run, better sleep may have protective effects on risk ...

Slow wave or deep sleep is a stage in the sleep cycle necessary for proper brain function and memory. Most people need 7–9 hours of sleep per night, but working out how much deep sleep they need is ...