[1] Sleep occurs in repeating periods, during which the body alternates between two distinct modes: rapid eye movement sleep (REM) and non-REM sleep. Although REM stands for "rapid eye movement", this mode of sleep has many other aspects, including virtual paralysis of the body. [2]

The SRS Podcast discusses the latest findings in sleep and circadian research, with an emphasis on research published in SLEEP and SLEEP Advances. Join us the first Tuesday of every month for new episodes!

Sleep is more than "lights out" time. Learn what happens when you sleep and why sleep is important for your mental and physical health.

Sleep is a body process that allows your body to rest, repair and restore itself. You need sleep to function properly. Lack of sleep has links to many health issues.

Our free quiz on the Better Health website asks about sleep, mental health and other lifestyle areas. You'll get advice to help you make changes where they matter most.

Quality sleep means you are getting uninterrupted and refreshing sleep. Getting quality sleep is not just about how many hours you sleep, but how well you sleep.

Sleep is a complex and dynamic process that affects how you function in ways scientists are now beginning to understand. This webpage describes how your need for sleep is regulated and what happens in the brain during sleep.

Sleep is the balm that soothes and restores after a long day. Sleep is largely driven by the body’s internal clock, which takes cues from external elements such as sunlight and temperature.

Sleep tips: 6 steps to better sleep You're not doomed to toss and turn every night. Consider simple tips for better sleep, from setting a sleep schedule to including physical activity in your daily routine.

As an individual matures into adulthood, an adult sleep pattern is established, characterized by the development of sleep-onset NREM sleep, the emergence of NREM sleep substages, the reduction or elimination of napping, and the decline of slow-wave activity.