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Consciousness (Sleep Disorders (Night Terrors (Extreme fear and screams or…

- - - - High levels of brain activity (similar to activity when awake)
    - - Inability to move muscles during REM sleep. May continue shortly after waking up
    - - increased amounts of REM sleep after it was deprived in previous nights
  - - - N1: Light sleep
        
        Hypnagogic images- hallucinations or vivid visual events
        
        Hypnic jerk- knees, legs, or whole body jerks
      - N2: Moderate sleep
        
        Sleep spindles- bursts of activity lasting one or two seconds
      - N3: Deep sleep
        
        Lowest level of functioning and when growth occurs