| Definition | Term |
| device that records eye movements | |
| a diverse group of drugs that have powerful effects on mental and emotional functioning, marked most prominently by distortions in sensory and perceptual experience | |
| refers to a progressive decrease in a person's responsiveness to a drug as a result of continued use | |
| a device that monitors the electrical activity of the brain over time by means of recording electrodes attached to the surface of the scalp | |
| exists when a person must continue to take a drug to satisfy intense mental and emotional craving | |
| sleep-inducing drugs that tend to decrease central nervous system activation and behavioral activity | |
| consists of sleep stages 3 and 4, during which low-frequenct delta waves become prominent in EEG recordings | |
| consists of sleep stages 1 through 3, which are marked by an absence of rapid eye movements, relatively little dreaming, and varied EEG activity | |
| sleep disorder involving chronic problems in getting adequate sleep | |
| exists when a person must continue to take a drug to avoid withdrawal illness | |
| encompasses a variety of beverages containing ethyl alcohol | |
| sleep problem involving frequent, reflexive gasping for air that awakens a person and disrupts sleep | |
| a compound drug that is related to both amphetamines and hallucinogens, especially mescaline; aka 'ecstasy' | |
| a disease marked by sudden and irresistible onsets of sleep during normal waking periods | |