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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. Brain activity and meditation - Wikipedia

   en.wikipedia.org/wiki/Brain_activity_and_meditation

   Highlighted region shows the anterior cingulate cortex, a region of the brain shown to be activated during meditation. Meditation and its effect on brain activity and the central nervous system became a focus of collaborative research in neuroscience, psychology and neurobiology during the latter half of the 20th century. Research on meditation ...

4. Brainwave entrainment - Wikipedia

   en.wikipedia.org/wiki/Brainwave_entrainment

   Brainwave entrainment is a colloquialism for 'neural entrainment', [25] which is a term used to denote the way in which the aggregate frequency of oscillations produced by the synchronous electrical activity in ensembles of cortical neurons can adjust to synchronize with the periodic vibration of external stimuli, such as a sustained acoustic ...

5. Music and sleep - Wikipedia

   en.wikipedia.org/wiki/Music_and_sleep

   Gentle and soothing music can lead to increased delta wave activities which indicate deep sleep. [19] Several experiments have tested listening to preferred music significantly decreases cortisol levels and reduces the amount of stress experienced.

6. Neural oscillation - Wikipedia

   en.wikipedia.org/wiki/Neural_oscillation

   Sleep stages are characterized by spectral content of EEG: for instance, stage N1 refers to the transition of the brain from alpha waves (common in the awake state) to theta waves, whereas stage N3 (deep or slow-wave sleep) is characterized by the presence of delta waves. [107] The normal order of sleep stages is N1 → N2 → N3 → N2 → REM.

7. Sharp waves and ripples - Wikipedia

   en.wikipedia.org/wiki/Sharp_waves_and_ripples

   Sharp waves and associated ripples are present in the mammalian brains of the species that have been investigated for this purpose, including mice, rats, rabbits, monkeys and humans. [5] In all of these species, they have been shown primarily to be involved in consolidation of recently acquired memories during the immobility and slow-wave sleep.

8. Non-rapid eye movement sleep - Wikipedia

   en.wikipedia.org/wiki/Non-rapid_eye_movement_sleep

   Stage 3 – previously divided into stages 3 and 4, is deep sleep, slow-wave sleep (SWS). Stage 3 was formerly the transition between stage 2 and stage 4 where delta waves, associated with "deep" sleep, began to occur, while delta waves dominated in stage 4.

9. Relaxation (psychology) - Wikipedia

   en.wikipedia.org/wiki/Relaxation_(psychology)

   Relaxation may help reduce insomnia in those who have sleeping disorders. Those with insomnia may even give up sleeping aids just by practicing relaxation techniques. [47] Avoiding unnecessary medication or sleep aids may help health. Even though relaxation cannot get rid of chronic diseases, it may help dull of the symptoms one may have.