Across
- 3. Waves that are not synchronous
- 4. Overpowering urge to sleep
- 5. Alters perception, thoughts, feelings (MDMA, LSD)
- 8. Waves that are synchronous
- 9. Caused by high levels of stress induced insomnia (Kenneth Parks)
- 10. physical or psychological dependence, or both
Down
- 1. Increasing amounts for the same effect
- 2. Causes drowsiness, sleep, and death (alcohol, opiates)
- 6. Causes the person to be alert, energetic (caffeine, nicotine)
- 7. Altered state of consciousness