Terms : Hide Images
| 24092237 | consciousness | our awareness of ourselves and our environment | |
| 24092238 | biological rhythms | periodic physiological fluctuations | |
| 24092239 | circadian rhythm | the biological clock; regular bodily rhythms that occur on a 24-hour cycle | |
| 24092240 | REM sleep | rapid eye movement sleep, a recurring sleep stage during which vivid dreams commonly occur. also known as paradoxial sleep, because the muscles are relaxed (except for minor twitches) but other body systems are active. | |
| 24092241 | alpha waves | the relatively slow brain waves of a relaxed, awake state | |
| 24092242 | sleep | periodic, natural, reversible loss of consciousness | |
| 24092243 | hallucination | false sensory experiences, such as seeing something in the absence of an external stimulus | |
| 24092244 | delta waves | the large, slow brain waves associated with deep sleep | |
| 24092245 | theta waves | brain waves indicating the early stages of sleep. | |
| 24092246 | insomnia | recurring problems in falling or staying asleep | |
| 24092247 | narcolepsy | a sleep disorder characterized by uncontrollable sleep attacks. The sufferer may lapse directly into REM sleep, often at inopportune times | |
| 24092248 | sleep apnea | A sleep disorder characterized by temporary cessations of breathing during sleep and repeated momentary awakenings. | |
| 24092249 | night terrors | a sleep disorder characterized by by high arousal and an apperance of being terrified; unlike nightmares, night terrors occur during stage 4 sleep, within 2 or 3 hours of falling asleep and are seldom remembered. | |
| 24092250 | dream | a sequence of images, emotions, and thoughts passing through a sleeping person's mind. Dreams are notable for their hallucinatory imagery, discontinuities and incongruities and for the dreamer's delusional acceptance of the content and later difficulties remembering it. | |
| 24092251 | manifest content | according to Freud, the remembered story line of a dream | |
| 24092252 | latent content | according to Freud, the underlying meaning of a dream. Freud believed that this functioned as a safety valve | |
| 24092253 | REM rebound | the tendency for REM sleep to increase following REM sleep deprivation (created by repeated awakenings during REM sleep) | |
| 24092254 | hypnosis | a social interaction in which one person suggests to another that certain perceptions, feelings, thoughts or behaviors will spontaneously occur | |
| 24092255 | posthypnotic suggestion | A suggestion, made during a hypnosis session, to be carried out after the subject is no longer hypnotized; used by some clinicans to help control undesired symptoms and behaviors. | |
| 24092256 | tolerance | the diminishing effect with regular use of the same dose of a drug, requiring the user to take larger and larger doses before experiencing the drug's effect | |
| 24092257 | withdrawal | the discomfort and distress that follow discontinuing the use of an addictive drug | |
| 24092258 | physical dependence | a physiological need for a drug, marked by unpleasant withdrawal symptoms when the drug is discontinued | |
| 24092259 | psychological dependence | a psychological need to use a drug, such as to relieve negative emotions | |
| 24092260 | addiction | compulsive drug craving and use | |
| 24092261 | depressants | drugs (such as alcohol, barbiturates and opiates) that reduce neural activity and slow body functions | |
| 24092262 | barbiturates | drugs that depress the activity of the central nervous system, reducing anxiety but impairing memory and judgement | |
| 24092263 | opiates | opium and its derivavatives such as morophine and heroin; they depress neural activity temproarily lessening pain and anxiety | |
| 24092264 | stimulants | drugs (such as caffeine, nicotine, and the more powerful amphetamines, cocaine and Ecstasy) that excite neural activity and speed up body functions | |
| 24092265 | amphetamines | drugs that stimulate neural activity, cuaisng speeded-up body functions and associated energy and mood changes | |
| 24092266 | methamphetamines | a powerfully addictive drug that stimulates the central nervous system, with speeded-up body functions and associated energy and mood changes; over time, appears to reduce baseline dopamine levels | |
| 24092267 | Ecstasy (MDMA) | a synthetic stimulant and mild hallucinogen. Produces euphoria and social intimacy, but with short-term health risks and longer-term harm to serotonin-producing neurons and to mood and cognition. | |
| 24092268 | hallucinogens | psychedelic drugs, such as LSD, that distort perceptions and evoke sensory images in the absence of sensory input | |
| 24092269 | LSD | A powerful hallucinogenic drug; also known as acid (lysergic acid diethylamide). | |
| 24092270 | THC | the major active ingredient in marijuana; triggers a variety of effects, including mild hallucinations | |
| 24092271 | near-death experience | an altered state of consciousness reported after a close brush with death; often similar to drug-induced hallucinations | |
| 24092272 | dualism | the presumption that mind and body are two distinct entities that interact | |
| 24092273 | monism | the presumption that mind and body are different aspects of the same thing | |
| 24093374 | dissociation | a split in consciousness which allows some thoughts and behaviors to occur simultaneously with others | |
| 24093375 | psychoactive drug | a chemical substance that alters perceptions and mood |
