| A | B |
|---|
| sleep apnea | Breathing interruption that occurs during sleep |
| amphetamine | Stimulant used to help people stay awake and reduce appetite |
| circadian rhythm | Biological clock |
| hallucination | Perception of an object or a sound that seems real but is not |
| rapid-eye-movement sleep | Stage of sleep in which we have the most vivid dreams |
| altered state of consciousness | State of awareness in which a person's sense of self or of the world alters |
| narcolepsy | Sleep problem in which people suddenly fall asleep no matter what time it is |
| delusion | False idea that seems real |
| detoxification | Removal of poisonous substances from the body |
| biofeedback | System that feeds back information about something happening in the body |
| consciousness | Awareness of oneself and one's environment. |
| selective attention | The focusing of attention on a particular stimulus. |
| preconscious | Descriptive of information that is not conscious but is retrievable into conscious awareness. |
| unconscious | According to Freud, a reservoir of mostly unacceptable thoughts, wishes, feelings, and memories of which we are unaware but which influences our behavior. |
| nonconscious | Descriptive of bodily processes, such as the growing of hair, of which we are not aware. |
| insomnia | Sleep disorder characterized by recurring problems in falling asleep or staying asleep. |
| night terror | Sleep disorder characterized by high arousal and apparent terror and are seldom remembered. |
| meditation | Systematic narrowing of attention that slows the metabolism and helps produce feelings of relaxation. |
| hypnosis | A condition in which people appear to be highly suggestible and to behave as if they are in a trance. |
| posthypnotic suggestion | Instructions given to a person under hypnosis that are supposed to be carried out after the hypnosis session has ended. |
| addiction | A compulsive need for and use of a habit-forming substance. |
| depressant | A drug that reduces the neural activity and slows body functions. |
| intoxication | A state of drunkenness characterized by impaired coordination and judgement. |
| narcotic | Type of drug that dulls the senses, relieves pain, and induces sleep; derived from the opium poppy plant. |
| stimulant | A drug that increases the neural activity and speeds up body functions. |
| hallucinogen | A psychedelic drug, such as LSD, that distorts perceptions and evokes sensory images in the absence of actual sensory input. |
