Mrs Lee-Bevan's Crossword on Sleep and Dreaming

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Across
  1. 1. Disorder where breathing repeatedly stops during sleep. (10)
  2. 2. Time it takes to fall asleep. (12)
  3. 4. Deep NREM sleep important for restorative processes. (6)
  4. 5. Body’s process to maintain internal stability, affects sleep. (11)
  5. 7. Brain waves seen in deep sleep (stages 3 and 4). (10)
  6. 12. Sequence of images, emotions, and thoughts during sleep. (5)
  7. 13. Hidden meaning behind the manifest content of a dream. (13)
  8. 16. Sleep stage associated with rapid eye movement and vivid dreams. (3)
  9. 17. State between sleep and full wakefulness. (11)
  10. 20. Psychologist who proposed dreams reveal unconscious desires. (5)
  11. 23. Difficulty falling or staying asleep. (8)
  12. 25. Deepest NREM sleep, slow-wave sleep predominates. (6)
  13. 26. Lightest stage of NREM sleep, drifting in and out of sleep. (6)
  14. 27. Accumulated deficit from insufficient sleep. (9)
  15. 28. Non-REM sleep, deeper stages without rapid eye movement. (4)
  16. 29. Disorder where muscles don’t become paralyzed during REM. (13)
  17. 31. Hormone produced by the pineal gland that regulates sleep. (10)
  18. 32. Measures electrical activity in the brain during sleep. (3)
  19. 33. Sleep disorder causing sudden sleep attacks. (10)
  20. 34. State between wakefulness and sleep. (10)
Down
  1. 1. Pattern of alternating NREM and REM sleep stages. (10)
  2. 3. Actual storyline or events of a dream. (13)
  3. 6. Sleep stage with sleep spindles and K-complexes. (6)
  4. 8. Brain gland responsible for melatonin production. (11)
  5. 9. Hormone associated with stress, usually lowest during sleep. (7)
  6. 10. Abnormal sleep behaviors such as sleepwalking or night terrors. (10)
  7. 11. Theory suggesting dreams result from brain activity interpretation. (18)
  8. 14. Body clock cycle that repeats roughly every 24 hours. (9)
  9. 15. Measures muscle activity, shows relaxation during REM. (3)
  10. 18. Region of the brain involved in regulating sleep-wake cycles. (9)
  11. 19. Brain waves seen in light sleep (stage 1). (10)
  12. 21. Increased REM sleep following deprivation. (10)
  13. 22. Condition caused by lack of sleep. (15)
  14. 24. Practices that help maintain healthy sleep patterns. (12)
  15. 30. Measures eye movements, useful for REM sleep research. (3)