Across
- 1. The sleep disorder that makes it difficult for people to stay awake during the day
- 7. The sleep stage that is characterised by decreased blood flow
- 8. A common dream symbol associated with anxiety and stress
- 9. It causes the feeling of falling while sleeping
- 12. A bothersome dream
Down
- 2. The type of brain activity which characterises sleep stage 2?
- 3. The brain wavelength characteristic of deep sleep
- 4. The philosopher thought that "disguised fulfilments of repressed infantile wishes"
- 5. The sleep stage in which we dream
- 6. The sleep disorder that makes it hard to fall asleep, to stay asleep, or causes people to wake up too early?
- 8. The region that much of the brain activity during sleep has been attributed to
- 10. The percentage of the world that dreams in black and white
- 11. The average duration of a sleep cycle