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Sleep stages

N2- second stage of light sleep

  • 45-55% of total sleep
  • Body temperature goes down
  • Heart rate and and breathing slow downs
  • Brain waves continue to slow
  • Muscles relax
  • Eye movement stops

N1-Lightest sleep

5% of sleep
  • 1st stage of sleep.
  • This is the transtion phase from being awake to falling asleep.
  • Easy to wake up from this stage
  • Plays an important role in transtioning into other sleep stages
  • Muscle activity decreases and some may occasionally experience brief muscle twitches

N-3 Deep sleep

10-15% of sleep
  • Also called slow wave sleep becuase brain waves reach thier slowest
  • Heart rate and breathing reach thier lowest levels
  • Muscles are fully relaxed
  • Body releases hormones critical for physical growth, bodily repair and immune support.
  • Linked to cognative function such as learning memory and insight formation.

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Rem sleep

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REM

20-25% of total sleep
  • Eyes rapidly move
  • Heart rate and breathing quicken
  • Brain activity increases
  • Dreams happen
  • Muscle repairs
  • Helps regulate emotions
  • Supports creativity memory and metal health

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