Terms : Hide Images
| 6491930944 | Consciousness | Our awareness of ourselves and our environment | 0 | |
| 6491935708 | Circadian rhythm | The biological clock; regular bodily rhythms that occur on a 24-hour cycle. | 1 | |
| 6491967236 | REM sleep | Rapid eye movement sleep; a recurring sleep stage during which vivid dreams commonly occur. Also known as paradoxical sleep, because the muscles are relaxed but other body systems are active | 2 | |
| 6491975044 | Alpha waves | The relatively slow brain waves of a relaxed, awake state. | 3 | |
| 6491982931 | Sleep | Periodic, natural loss of consciousness-as distinct from consciousness resulting from a coma, general anesthesia, or hibernation | 4 | |
| 6491991143 | Hallucinations | False sensory experiences, such as seeing something in the absence of an external visual stimulus | 5 | |
| 6492007436 | Delta waves | The large, slow brain waves associated with deep sleep. | 6 | |
| 6492013544 | NREM sleep | Non-rapid eye movement sleep; encompasses all sleep stages except for REM sleep. | 7 | |
| 6492020227 | Insomnia | Recurring problems in falling or staying asleep. | 8 | |
| 6492029173 | Narcolepsy | A sleep disorder characterized by uncontrollable sleep attacks. The sufferer may lapse directly into REM sleep, often at inopportune times | 9 | |
| 6492042329 | Sleep apnea | A sleep disorder characterized by temporary cessations of breathing during sleep and repeated momentary awakenings. | 10 | |
| 6492059797 | Night terrors | A sleep disorder characterized by high arousal and an appearance of being terrified; unlike nightmares, they occur during stage $ sleep, within two or three hours of falling asleep, and are seldom remembered | 11 | |
| 6492063249 | Dream | A sequence of images, emotions, and thoughts passing through a sleeping person's mind. Noted for their hallucinatory imagery, discontinuities, and incongruities, and for the person's delusional acceptance of the content and later difficulties remembering it | 12 | |
| 6492080812 | Manifest content | According to Freud, the remembered story line of a dream (as distinct from its latent, or hidden, content) | 13 | |
| 6492086576 | Latent content | According to Freud, the underlying meaning of a dream (as distinct from its manifest content). | 14 | |
| 6492102615 | REM rebound | The tendency for REM sleep to increase following REM sleep deprivation (created by repeated awakenings during REM sleep) | 15 | |
| 6492106793 | hypnosis | A social interaction in which one person suggests to another that certain perceptions, feelings, thoughts, or behaviors will spontaneously occur | 16 | |
| 6492114454 | Posthypnotic suggestion | A suggestion, made during a hypnosis session, to be carried out after the subject is no longer hypnotized; used by some clinicians to help control undesired symptoms and behaviors | 17 | |
| 6492122858 | dissociation | A split in consciousness, which allows some thoughts and behaviors to occur simultaneously with others | 18 | |
| 6492138142 | Psychoactive drugs | A chemical substance that alters perceptions and moods. | 19 | |
| 6492147226 | 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. | 20 | |
| 6492155738 | Withdrawal | The discomfort and distress that follow discontinuing the use of an addictive drug | 21 | |
| 6492173769 | Physical dependence | A physiological need for a drug, marked by unpleasant withdrawal symptoms when the drug is discontinued. | 22 | |
| 6492181787 | Psychological dependence | A psychological need to use a drug, such as to relieve negative emotions. | 23 | |
| 6492191971 | Addiction | Compulsive drug craving and use, despite adverse consequences | 24 | |
| 6492214708 | Depressants | Drugs (such as alcohol, barbiturates, and opiates) that reduce neural activity and slow body functions. | 25 | |
| 6492224203 | Barbiturates | Drugs that depress the activity of the central nervous system, reducing anxiety but impairing memory and judgement. | 26 | |
| 6492233345 | Opiates | Opium and its derivatives, such as morphine and heroin; they depress neural activity, temporarily lessening pain and anxiety. | 27 | |
| 6492238837 | Stimulants | Drugs (such as caffeine, nicotine, and the more powerful amphetamines, cocaine, and Ecstasy) that excite neural activity and speed up body functions. | 28 | |
| 6492243923 | Amphetamines | Drugs that stimulate neural activity, causing speeded up body functions and associated energy and mood changes | 29 | |
| 6492258557 | Methamphetamine | 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. | 30 | |
| 6492268924 | 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. | 31 | |
| 6492271613 | Hallucinogens | Psychedelic drugs, such as LSD, that distort perceptions and evoke sensory images in the absence of sensory input. | 32 | |
| 6492277794 | LSD | A powerful hallucinogenic drug; also known as acid | 33 | |
| 6492282268 | Near-death experience | An altered state of consciousness reported after a close brush with death (such as through cardiac arrest); often similar to drug-induced hallucinations. | 34 | |
| 6492285785 | THC | The major active ingredient in marijuana; triggers a variety of effects including mild hallucinations. | 35 |
