Sleeping and Stuff

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Sleeping and Stuff
2013-10-29 17:13:57

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  1. Circadian Rhythm
    the biological clock; regular bodily rhythms (e.g. temperature and wakefulness) that occur on a 24-hour cycle
  2. What happens in circadian rhythm?
    • Bright light in the morning tweaks circadian clock by activating light-sensitive retinal proteins
    • Proteins control clock by triggering signals to the brain's SCN
    • SCN causes brain's pineal gland to decrease melatonin production in the morning and increase it in the evening
  3. REM Sleep
    • rapid eye movement sleep
    • a recurring sleep stage during which vivid dreams commonly occur
    • Muscles are relaxed, but other body systems are active
  4. Sleep
    periodic, natural, reversible loss of consciousness, as distinct from unconsciousness resulting from a coma, general anesthesia, or hibernation
  5. Alpha Waves
    the relatively slow brain waves of a relaxed, awake state
  6. Stage 1 Sleep
    • Slow Breathing
    • Irregular Brain Waves
    • May experience hallucinations and/or hypnagogic sensations
  7. Stage 2 Sleep
    • characterized by periodic bursts of rapid, rhythmic brainwave activity
    • Asleep, though can be awakened without much difficulty
    • Sleeptalking can begin occuring
  8. Stage 3 Sleep
    • Transitional Stage
    • Brain starts to emit delta waves
  9. Delta Waves
    the large, slow brain waves associated with deep sleep
  10. Stage 4 Sleep
    • Deep Sleep Stage
    • Delta waves are still emitted
    • Near the end of stage 4, children may wet the bed or begin sleepwalking
  11. Sleep Theories
    • Sleep protects and helps us better suit our ecological niche
    • Sleep helps us recuperate by restoring and repairing brain tissue
    • Sleep is for rebuilding our fading memories of the day's experiences
    • Sleep also feeds creative thinking
    • Sleep may play a role in the growth process
  12. Insomnia
    recurring problems in falling or staying asleep
  13. Narcolepsy
    • a sleep disorder characterized by uncontrollable sleep attacks
    • sufferer may lapse directly into REM sleep, often at inopportune times
  14. Sleep apnea
    a sleep disorder characterized by temporary cessations of breathing during sleep and repeated momentary awakenings
  15. Night Terror
    • a sleep disorder characterized by high arousal and an appearance of being terrified
    • Unlike nightmares, night terrors occur during Stage 4 sleep