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  2. Slow-wave sleep - Wikipedia

    en.wikipedia.org/wiki/Slow-wave_sleep

    Slow-wave sleep (SWS), often referred to as deep sleep, is the third stage of non-rapid eye movement sleep (NREM), where electroencephalography activity is characterised by slow delta waves. [ 2 ] Slow-wave sleep usually lasts between 70 and 90 minutes, taking place during the first hours of the night. [ 3 ]

  3. What Is Deep Sleep? Understanding the 4 Sleep Cycles & Why ...

    www.aol.com/deep-sleep-understanding-4-sleep...

    Known as slow-wave sleep or stage 3 non-REM sleep, this is the deepest stage of sleep and the hardest to wake up from. Brain activity slows down, muscles and bones strengthen, hormones regulate ...

  4. Neuroscience of sleep - Wikipedia

    en.wikipedia.org/wiki/Neuroscience_of_sleep

    During slow wave sleep, the cortex generates brief periods of activity and inactivity at 0.5–4 Hz, resulting in the generation of the delta waves of slow wave sleep. During this period, the thalamus stops relaying sensory information to the brain, however it continues to produce signals, such as spindle waves, that are sent to its cortical ...

  5. Non-rapid eye movement sleep - Wikipedia

    en.wikipedia.org/wiki/Non-rapid_eye_movement_sleep

    Slow Wave Sleep (SWS) is a highly active state unlike a state of brain quiescence as previously thought. Brain imaging data has shown that during NREM sleep the regional brain activity is influenced by the waking experience just passed. A study was done involving an experimental and a control group to have them learn to navigate a 3D maze.

  6. Getting less slow-wave sleep as you age may increase your ...

    www.aol.com/getting-less-slow-wave-sleep...

    The authors wanted to know whether chronic reductions in slow-wave sleep over time are linked with dementia risk in humans and vice versa — whether dementia-related processes in the brain may ...

  7. Parasomnia - Wikipedia

    en.wikipedia.org/wiki/Parasomnia

    NREM parasomnias are arousal disorders that occur during stage 3 (or 4 by the R&K standardization) of NREM sleep—also known as slow wave sleep (SWS). They are caused by a physiological activation in which the patient's brain exits from SWS and is caught in between a sleeping and waking state.

  8. Sleep - Wikipedia

    en.wikipedia.org/wiki/Sleep

    The optimal nap duration is around 10–20 minutes, as researchers have proven that it takes at least 30 minutes to enter slow-wave sleep, the deepest period of sleep. [46] Napping too long and entering the slow wave cycles can make it difficult to awake from the nap and leave one feeling unrested. This period of drowsiness is called sleep inertia.

  9. Sleep cycle - Wikipedia

    en.wikipedia.org/wiki/Sleep_cycle

    The sleep cycle is an oscillation between the slow-wave and REM (paradoxical) phases of sleep. It is sometimes called the ultradian sleep cycle , sleep–dream cycle , or REM-NREM cycle , to distinguish it from the circadian alternation between sleep and wakefulness .