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This stage number appears in both REM and NREM sleep

This stage number appears in both REM and NREM sleep. Stage 1. Most healthful stage; 50% of adult sleep is here. Stage 2. Dreams occur in this stage. Stage 1 REM. Closest stage to consciousness. Stage 1 NREM. Least EEG activity appears here. Stage 4. Stage 2 NREM. Sleep state.

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This stage number appears in both REM and NREM sleep

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  1. This stage number appears in both REM and NREM sleep • Stage 1

  2. Most healthful stage; 50% of adult sleep is here • Stage 2

  3. Dreams occur in this stage • Stage 1 REM

  4. Closest stage to consciousness • Stage 1 NREM

  5. Least EEG activity appears here • Stage 4

  6. Stage 2 NREM • Sleep state

  7. Stage 1 REM • Dream State

  8. Stage 1 NREM • Hypnopompic State

  9. Stage 3 NREM • Hypnagogic state

  10. Stage 4 NREM • Hypnagogic state

  11. Slowest brain waves • Delta

  12. Bursts of electrical energy seen in stage 2 • Sleep spindles

  13. Seen during alert wakefulness • Beta waves

  14. Seen in relaxed wakefulness, early stage 1 NREM • Alpha waves

  15. Follow alpha waves in stage 1 and 2 NREM • Theta waves

  16. Leading cause of death in infants • Sudden Infant Death Syndrome (SIDS)

  17. Not able to fall or stay asleep • Insomnia

  18. Two hypersomnias • Narcolepsy and apnea

  19. Bedwetting • Enuresis

  20. Night terrors and sleepwalking are 2 types of this • Parasomnias

  21. Measures electrical activity in the brain • Electroencephalogram (EEG)

  22. Measures eye movement • Electro-oculograph EOG

  23. Measures electrical impulses through muscle • Electromyogram EMG

  24. Measures heart rate • Electrocardiograph (EKG)

  25. Amplifies signals and produces record of physiological changes • Polysomnograph

  26. Difference between hours of sleep needed and gotten. • Sleep debt

  27. Short episodes of sleep that intrude on wakefulness • microsleeps

  28. REM-deprived people exhibit this when allowed to sleep naturally • REM Rebound

  29. East-west travel is an example of this, which is easier to adapt to • Phase delay

  30. Older adults spend little time in this state of sleep, thus awakening often • Hypnagogic

  31. Internal biological changes that occur daily • Circadian rhythms

  32. Hormone involved in inducing sleep • Melatonin

  33. Neurons in hypothalamus that control sleep-wake cycle • Suprachiasmatic Nucleus

  34. Gland that secretes melatonin • Pineal

  35. Length of free running sleep-wake cycle • 25 hours

  36. Temperature fluctuations without sleep counter this theory • Cool off brain

  37. We sleep at night due to this theory • Self-protection (out of harm’s way)

  38. Common sense theory • Rest/ energy conservation

  39. REM sleep is important for this • Neural development

  40. Francis Crick believes sleep allows us to do this • Unlearn or purge stimulus overload

  41. Sleep disorder where you awake in panic without nightmare • Night Terror

  42. Babies are most likely to wake up in this stage • 1 REM

  43. Adults are most likely to wake in this stage • Stage 2 NREM

  44. You are most difficult to awaken in this stage and state • Stage 3 / 4 Hypnagogic

  45. Narcolepsy Sleep attacks while awake

  46. Sleepwalking most likely to occur in this stage • Stage 4

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