Across
- 5. daily biological cycles that are about 24 hours long
- 7. dream theory based on biology
- 11. characterized by an irresistible compulsion to sleep during daytime
- 12. rapid eye movement; paradoxical sleep
- 13. individual requires greater doses to achieve the same effect
- 14. hidden meaning of a dream
Down
- 1. happens after the reduction of drug intake
- 2. the theory that says sleep's main purpose is to increase chances of survival
- 3. dream theory that dreams symbolize wish fulfillment
- 4. the actual content/storyline of the dream
- 6. the theory that sleep allows us to recharge our bodies and recover from fatigue
- 8. chronic inability to sleep normally
- 9. causes the person to stop breathing when asleep
- 10. theory that sleep helps strengthen neuronal connections that serve as the basis for learning and memory