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Modules 23 & 24 - Coggle Diagram

- - - - Heart rate rises; breathing becomes rapid and irregular
      - Genitals become aroused, men may have an erection, women may experience vaginal lubrication
      - Muscle paralysis occurs, except for an occasional twitch
  - - - sleep you may experience fantastic images resembling hallucinations
      - You may have a sensation of falling or floating weightlessly. Sometimes a leg or arm may jerk
      - These hypnagogic sensations may later be incorporated into your memories.
      - You then relax more deeply and begin about 20 minutes of NREM-2 sleep, with its periodic sleep spindles - bursts of rapid, rhythmic brain-wave activity, and K-complexes
- - - - Sleeping somewhere safe
    - - Sleep helps restore the immune system and repair brain tissue.
      - Sleep gives resting neurons time to repair themselves, while pruning or weakening unused connections
    - - sleep consolidates our memories be replaying recent learning and strengthening neural connections
    - - Dreams can inspire noteworthy artistic and scientific achievements.
      - A complete night's sleep gives a boost to our thinking and learning
    - - During slow-wave sleep, which occurs mostly in the first half of the pituitary gland releases human growth hormone, which is necessary for muscle development