Ch. 5c

Sleep apnea

A sleep disorder characterized by frequent reflexive gasping for air that awakens a person and disrupts sleep. (SA)

tolerance

A progressive decrease in a person's responsiveness to a drug.

REM sleep

A deep stage of sleep marked by rapid eye movements, high-frequency brain waves, and dreaming. (RS)

night terrors

Abrupt awakenings from NREM sleep accompanied by intense autonomic arousal and feelings of panic. (NT)

somnambulism

Arising and wandering about while remaining asleep.

psychoactive drugs

Chemical substances that modify mental, emotional, or behavioral functioning. (PD)

stimulants

Drugs that tend to increase central nervous system activation and behavioral activity.

opiates

Have same effects as narcotics.

sedatives

Sleep-inducing drugs that tend to decrease central nervous system activation and behavioral activity.

psychological dependence

The condition that exists when a person must continue to take a drug in order to satisfy intense mental and emotion craving for the drug. (PD)

physical dependence

The condition that exists when a person must continue to take a drug to avoid withdrawal illness. (PD)

NREM sleep

a recurring sleep state during which rapid eye movements do not occur and dreaming does not occur (NS)

REM rebound

the tendency for REM sleep to increase following REM sleep deprivation (created by repeated awakenings during REM sleep) (RR)