Consciousness

4. excite neural activity and speed up body functions
10. drug chemical substance that alters perceptions and moods
11. mental series of exercises meant to refocus attention and achieve a trancelike state of consciousness
12. our awareness of ourselves and our environment
14. recurring problems in falling or staying asleep
17. drugs that reduce neural activity and slow body functions

1. sleep disorder; uncontrollable sleep attacks, sometimes lapsing directly into rem sleep
2. recurring sleep stage where vivid dreams occur; muscles relaxed, other body systems active
3. psychedelic, distort perceptions and gives sensory images without sensory input
5. state of consciousness in which a person is especially susceptible to suggestion
6. opium and its derivatives, depress neural activity, temporarily lessening pain and anxiety
7. rhythm internal biological clock; regular bodily rhythms that occur on a 24-hour cycle
8. content the underlying meaning of a dream
9. periodic, natural loss of consciousness
13. content the remembered story line of a dream
15. sequence of images, emotions, and thoughts passing through a sleeping person's mind
16. apnea sleep disorder; repeatedly stops breathing for short period of times