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- Dictionarysleep/sliːp/
noun
- 1. a condition of body and mind that typically recurs for several hours every night, in which the eyes are closed, the postural muscles relaxed, the activity of the brain altered, and consciousness of the surroundings practically suspended: "I was on the verge of sleep"
- 2. a gummy secretion found in the corners of the eyes after sleep: "she sat up, rubbing the sleep from her eyes"
verb
- 1. be in a state of sleep; be asleep: "she slept for half an hour"
- 2. provide (a specified number of people) with beds, rooms, or places to stay the night: "studios sleeping two people cost £70 a night"
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Jun 19, 2023 · Overview. What is sleep? Sleep is a normal body process that allows your body and brain to rest. At first glance, sleep is deceptively simple. For most people, it’s just a matter of getting comfortable, closing your eyes and drifting into slumber.
Oct 1, 2021 · Sleep is a state that is characterized by changes in brain wave activity, breathing, heart rate, body temperature, and other physiological functions. Depending on the sleep stage, different physiological functions may be more active and variable (for example, during REM sleep), or less active and more stable (for example, during NREM.
Jan 22, 2024 · Sleep is a vital and mysterious phenomenon that is critical to mental and physical health. Learn about the basics of sleep and tips for getting better rest.
Jun 18, 2024 · Brain Basics: Understanding Sleep. Sleep is an important part of your daily routine—you spend about one-third of your time doing it. Quality sleep – and getting enough of it at the right times -- is as essential to survival as food and water.
Jun 8, 2024 · Sleep, a normal, reversible, recurrent state of reduced responsiveness to external stimulation that is accompanied by complex and predictable changes in physiology. Sleep contrasts with wakefulness, in which state there is an enhanced potential for sensitivity and an efficient responsiveness to external stimuli.
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.
What exactly does sleep do for your body and mind? Here’s what researchers know about the science of sleep—including the stages of sleep, your biological clock, health connections and more.
Apr 5, 2024 · Sleep is an essential function that allows your body and mind to recharge, leaving you refreshed and alert when you wake up. Healthy sleep also helps the body remain healthy and stave off diseases. Without enough sleep, the brain cannot function properly, impairing your abilities to concentrate, think clearly, and process memories.
Oct 23, 2020 · Sleep is a complex and dynamic biological process that still isn’t fully understood. Learn about how sleep works and why it’s vital for overall health.
Dec 22, 2009 · Sleep allows the brain and body to slow down and engage in processes of recovery, promoting better physical and mental performance the next day and over the long-term. What happens when you don’t sleep is that these fundamental processes are short-circuited, affecting thinking, concentration, energy levels, and mood.
