alphawaves		A sleep disorder characterized by high arousal and an appearance of being terrified.
lsd		A sleep disorder characterized by temporary cessations of breathing during sleep and consequent momentary reawakenings.
psychoactivedrug		A powerful hallucinogenic drug, also known as "acid."
circadianrhythm		Opium and its derivatives, such as morphine and heroin; they depress neural activity, temporarily lessening pain and anxiety.
psychologicaldependence		Drugs the depress the activity of the central nervous system, reducing anxiety but impairing memory judgement.
latentcontent		Hilgard's term describing a hypnotized subject's awareness of experiences, such as pain, that go unreported during hypnosis.
insomnia		false sensory experices, such as seeing something in the abscence of an external visual stimulus.
deltawaves		The tendency for REM sleep to increase following REM sleep deprivation (created by repeated awakenings during REM sleep.)
sleep		The major active ingredient in marijuana, triggers a variety of effects, including mild hallucinations
depressants		The diminishing effect with regular use of the smae dose of a drug, requiring the user to takea larger and larger doses before experiencing the drug's effect.
hallucinogens		The biological clock; regular bodily rhythms (for example, of temperature and wakefulness) that occur on a 24-hour cycle.
withdrawal		Periodic, natural, reversible loss of consciousness -as distinct from unconsciousness resulting from a coma, general anesthesia, or hibernation.
thc		The discomfort and distress that follow discontinuing the use of an addictive drug.
amphetamines		A social interaction in which one person suggets to another that certain perceptions, feelings, thoughts, or behaviors will spontaneously occur.
selectiveattention		The relatively slow brain waves of a relaxed, awake state.
hiddenobservation		Psychedelic ("mind-manifesting") drugs, such as LSD, that distort perceptions and evoke sensory images in the absence of sensory input.
nightterrors		A psychological need to use a drug, such as to relieve negative emotions.
consciousness		The large, slow brain waves associated with deep sleep.
hypnosis		Drugs that stimulate neural activity, causing speeded-up body functions and associated energy and mood changes.
remrebound		A split in consciousness, which allows some thoughts and behaviors to occur simultaneously with others.
manifestcontent		Supposed inability to recall what one experienced during hypnosis; induced by the hyponist's suggestion.
tolerance		Drugs (such as caffeine, nicotine, and the more powerful amphetamines and cocaine) that excite neural activity and speed up body functions.
dissociation		Rapid eye movement sleep, a recurring sleep stage during which vivid dreams commonly occur. Also known as paradoxical sleep because the muscles are relaxed (except for minor twitches) but other body systems are active.
opiates		A physiological need for a drug, marked by unpleasant withdrawal symptoms when the drug is discontinued.
dream		An altered state of consciousness reported after a close brush with death (such as through cardiac arrest); often similar to drug-induced hallucinations.
fantasypronepersonality		Drugs (such as alcohol, barbiturates, and opiates) that reduce neural activity and slow body functions.
remsleep		A sequence of images, emotions, and thoughts passing through a sleeping person's mind.
sleepapnea		Recurring problems in falling or staying asleep.
narcolepsy		According to Freud, the remembered story line of a dream (as distinct from its latent content).
physicaldependence		A chemical substance that alters perceptions and mood.
stimulants		According to Freud, the underlying meaning of a dream (as distinct from its manifest content). A "safety valve."
barbiturates		Our awareness of ourselves and our environments.
posthypnoticamnesia		The focusing of conscious awareness on a particular stimulus.
hallucinations		Someone who imagines and recalls experiences with lifelike vividness and who spends considerable time fantasizing.
neardeathexperience		A sleep disorder characterized by uncontrollable sleep attacks. The sufferer may lapse directly into REM sleep, often at inopportune times.