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  1. Sleep - Wikipedia

    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 …

  2. Brain Basics: Understanding Sleep - National Institute of …

    Feb 25, 2025 · 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 …

  3. About Sleep | Sleep | CDC

    May 15, 2024 · 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.

  4. Sleep: What It Is, Why It’s Important, Stages, REM & NREM

    Jun 19, 2023 · 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.

  5. Why Do We Need Sleep?

    Jul 10, 2025 · Everyone needs sleep, but about one in three American adults don’t get enough of it. The consequences of sleep deprivation are serious, so it’s worth learning why sleep …

  6. The Science of Sleep: Understanding What Happens When You Sleep

    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 …

  7. Sleep | Definition, Patterns, Deprivation, & Theories | Britannica

    Jan 2, 2026 · Sleep usually requires the presence of relaxed skeletal muscles and the absence of the overt goal-directed behaviour of which the waking organism is capable. The characteristic …

  8. Healthy Sleep - MedlinePlus

    Dec 9, 2025 · Sleep is a natural process that helps your body restore energy, supports learning and memory, and keeps you healthy. During sleep, your brain cycles through different stages …

  9. Sleep | Psychology Today

    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. The...

  10. Welcome To Our Practice | Village Sleep Lab | The Villages, FL

    Click on "Sleep Tips" and "Common Sleep Problems" on the right for more information about sleep apnea and other common sleep problems. We provide countless services including …