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Across 1. drugs including hallucinogens and marijuana that produce hallucinations or increased feelings of relaxation and intoxication 5. drugs that cause false sensory messages, altering the perception of reality 7. relatively rare disorder in which the person experiences extreme fear and screams or runs around during deep sleep without waking fully 8. the feeling a drug is needed to continue a feeling of emotional or psychological well-being 9. substance derived from the opium poppy from which all narcotic drugs are derived 13. revised version of the activation synthesis explanation of dreams in which information that is accessed during waking hours can have an influence on the synthesis of dreams 16. state of consciousness in which the person is especially susceptible to suggestion 18. drugs that produce a mixture of psychomotor stimulant and hallucinogenic effects 21. a natural drug derived from the leaves of the coca plant 23. theory of sleep proposing that animals and humans evolved sleep patterns to avoid predators by sleeping when predators are most active 24. syntheized drug now used as an animal tranquilizer that can cause stimulant, depressant, narcotic, or hallucinogenic effects 25. state in which there is a shift in the quality or pattern of mental activity as compared to waking consciousness 27. mild hallucinogen derived from the leaves and flowers of a particular type of hemp plant 32. the inability of the voluntary muscles to move during REM sleep 38. explanation that states that dreams are created by the higher centers of the cortex to explain the activation by the brain stem of corticol cells during REM sleep periods 42. stimulants that are synthesized in laboratoies rather than being found in nature 43. drugs that alter thinking, perception, and memory 44. the active ingredient in tobacco 45. narcotic drug derived from opium, used to treat severe pain 46. drugs that decrease the functioning of the nervous sustem 47. natural hallucinogen found in certain mushrooms 48. physical symptoms that can include nausea, pain, tremors, crankiness, and high blood pressure, resulting from a lack of an addictive drug in the body systems 49. increased amounts of REM sleep after being deprived of REM sleep on earlier nights 50. any of the stages of sleep that do not include REM 51. the inability to get to sleep, stay asleep, or get a good quality of sleep

Down 2. powerful synthetic hallucinogens 3. theory that assumes that people who are hypnotized are not in an altered state but are merely playing the role expected of them in the situation 4. depressant drugs that have a sedative effect 6. long, slow waves that indicate the deepest stage of sleep 10. natural hallucinogen derived from the peyote cactus buttons 11. a cycle of bodily rhythm that occurs over a 24-hour period 12. a person's awareness of everything that is going on around him or her at any given moment, which is used to organize behavior 14. brain waves indicating the early stages of sleep 15. sleep disorder in which a person falls immediately into REM sleep during the day without warning 17. the chemical resulting from fermentation or distillation of various kinds of vegetable matter 19. disorder in which the person stops breathing for nearly half a minute or more during sleep 20. a rare disorder in which the mechanism that blocks the movement of the voluntary muscles fails, allowing the person to thrash around and even get up and act out nightmares 22. state in which thoughts, feelings, and sensations are clear, organized, and the person feels alert 26. a mind stimulant found in coffee, tea, and several other plant-based substances 27. designer drug that can have both stimulant and hallucinatory effects 28. brief sidesteps into sleep lasting only a few seconds 29. brain waves that indicate a state of relaxation or light sleep 30. bad dreams occurring during REM sleep 31. drugs that lower anxiety and reduce stress 33. condition occurring when a person's body becomes unable to function normally without a particular drug 34. theory of sleep proposing that sleep is necessary to the physical health of the body and serves to replenish chemicals and repair cellular damage 35. stage of sleep in which the eyes move rapidly under the eyelids and the person is typically experiencing a dream 36. any significant loss of sleep, resulting in problems in concentration and irritability 37. drugs that increase the functioning of the nervous system 39. narcotic drug derived from opium that is extremely addictive 40. an episode of moving around or walking around in one's sleep 41. a class of opium-related drugs that suppress the sensation of pain by binding to and stimulating the nervous system's natural receptor sites for endorphins