Across
- 2. the most common when dreaming
- 6. performing complex behavior while in deep sleep
- 7. vivid dreams that can be upsetting
- 13. condition of altered consciousness
- 14. most people believe this sleep theory
- 16. we sleep to conserve energy theory
- 17. occurs when breathing repeatedly stops during sleep
- 18. brain activity begins to pick up and eyes rapidly move
Down
- 1. system that tracks the brain's activity
- 3. hard to fall or stay asleep
- 4. also known as deep sleep
- 5. people will show panic and terror while sleeping
- 8. a state of awareness
- 9. exhaustion and sudden attacks of sleep
- 10. the dozing off stage of sleep
- 11. electrical impulses in the brain
- 12. mental activity that happens during sleep
- 15. body enters a more subdued state