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25 Cards in this Set

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  • Back
consciousness
Our awareness of ourselves and our environment.
selective attention
The focusing of conscious awareness on a particular stimulus,as in the cocktail party effect.
circadian rhythm
The biological clock; regular bodily rhythms that occur on a 24-hour cycle.
REM sleep
Rapid eye movement sleep; a recurring sleep stage during which vivid dreams commonly occur.
alpha waves
The raltively slow brain waves of a relaxed, awake state.
delta waves
The large, slow brain waves associated with deep sleep.
insomnia
A sleep disorder involving recurring problems in falling or staying asleep.
narcolepsy
A sleep disorder characterized by uncrontrollable sleep attacks in which the sufferer lapses directly into REM sleep,often at inopportune times.
sleep apnea
A sleep disorder characterized by temporary cessations of breathing during sleep and consequent momentary reawakenings.
night terrors
A sleep disorder characterized by high arousal and an appearance of being terrified.
manifest content
According to Freud,the remembered story line of a dream(as distinct from its latent content)
latent content
According to Freud, the underlying but censored meaning of a dream(as distinct from its manifest content).Fred believed that a dream's latent content functions as a safety valve.
REM rebound
The tendency for REM sleep to increase following REM sleep deprivation.
hypnosis
An apparently heightened suggestibility in which some people narrow their focus of attention and claim to experience imaginary happenings as if they were real.
dissociation
A split in consciousness,which allows some thoughts and behaviors to occur simulataneously with others.
psychoactive drug
A chemical substance that alters mood and perceptions.
tolerance
The diminishing of a drug's effect with regular use of the same dose, requiring the user to take larger and larger doses before experiencing the drug's effect.
withdrawal
The discomfort and distress that follow the discontinued use of addictive drugs.
depressants
Drugs taht reduce neural activity and slow body functions.
stimulants
Drugs that excite neural activity and speed up body functions.
barbiturates
drugs that depress the activity of the central nervous system,remducing anxiety but impairing memory and judgment.
Opiates
Depresses neural activity, temporarily lessening the painand anxiety.
amphetamines
Drugs that stimulate neural activity,causing speeded-up body functions and associated energy and mood changes.
hallucinations
False sensory experiences, such as seeing something without any external visual stimulus.
near-death experience
An altered state of consciousness reported after a close brush with death;often similar to drug-induced hallucinations.