Sleep is a state of reduced mental and physical activity in which consciousness is altered and certain sensory activity is inhibited. During sleep, there is a marked decrease in muscle activity and interactions with the surrounding environment.

The meaning of SLEEP is the natural, easily reversible periodic state of many living things that is marked by the absence of wakefulness and by the loss of consciousness of one's surroundings, is accompanied by a typical body posture (such as lying down with the eyes closed), the occurrence of dreaming, and changes in brain activity and physiolo...

2024年10月21日 · During normal sleep, you cycle through REM and four stages of non-REM (NREM) sleep numerous times a night. Stage 1 of NREM sleep is the lightest, while stage 4 is the deepest.

2024年8月7日 · Conditions affecting your mental and physical health may be the cause for oversleeping. Health conditions like chronic pain, diabetes, fibromyalgia, and hypothyroidism may make it hard for you to...

2024年10月19日 · What Happens to Your Body When You Sleep? You may be resting when you sleep, but there’s a lot going on behind the scenes. What’s happening varies depending on which part of sleep you’re in --...

2021年10月1日 · Fifty years of research on brain activity and physiological patterns of sleeping has revealed a great deal about what sleep is and what it is not. We all have at least a vague notion of what sleep is, but that doesn't mean that defining this mysterious part of our lives is …

2023年9月6日 · Every animal sleeps -- some more than others -- but why they do it is a mystery to scientists. Is sleep more than just beauty rest? Could skimping on it kill you? And how much do you really need?

If a vehicle, tent, etc. sleeps a particular number of people, it provides enough space or beds for that number of people to be able to sleep in it: The tent sleeps four comfortably . sleep like a …

2004年10月12日 · In general, most healthy adults are built for 16 hours of wakefulness and need an average of eight hours of sleep a night. However, some individuals are able to function without sleepiness or drowsiness after as little as six hours of sleep. Others can't perform at their peak unless they've slept ten hours.

2025年1月16日 · By improving your sleep hygiene, you can fall asleep faster, stay asleep for longer, boost your overall health, and improve how you think and feel during the day. Getting in sync with your body’s natural sleep-wake cycle, or circadian rhythm, is one of the most important strategies for sleeping better.