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In statistics a population is
Delta Waves
Slow brain waves primarily associated with deep sleep and brain healing.
Dreaming
The experience of envisioned images, sounds, thoughts, or emotions during sleep, particularly REM sleep.
Night Terror
A sleep disorder causing feelings of panic or dread typically occurring during the first few hours of stage 3-4 non-REM sleep; more intense than a nightmare.
Workdays
Days designated for professional or official work activities, typically excluding weekends and public holidays.
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