Dreams!

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Across
  1. 4. Phases of the sleep cycle
  2. 5. An unpleasant dream
  3. 6. An altered state of consciousness
  4. 7. When an object or person represents an underlying idea
  5. 9. They occur during REM sleep
Down
  1. 1. When one awakens during a dream paralyzed
  2. 2. A dream that's repeated over a long period of time
  3. 3. When you are conscious that you are dreaming
  4. 8. A sleep disorder in which you can't fall asleep
  5. 10. Stands for Rapid Eye Movement