Sleep and Dreaming Flashcards
Consciousness
our subjective awareness of ourselves and our environment
Circadian Rhythm
our biological clock regular bodily rhythms that occur on a 24-hour cycle. (temperature or wakefulness)
REM sleep
recurring sleep stage during which vivid dreams commonly occur. paradoxical sleep, because muscles are relaxed but other body systems active.
Alpha Waves
the relatively slow brain waves of a relaxed, awake state
sleep
periodic, natural loss of consciousness
hallucinations
false sensory experiences, such as seeing something in the absence of an external visual stimulus
delta waves
the large, slow brain waves associated with the deep sleep of NREM
NREM
non rapid eye movement sleep, encompasses all sleep stages except for REM sleep
Insomnia
recurring problems in falling or staying asleep
Narcolepsy
a sleep disorder characterized by uncontrollable sleep attacks. sufferer may lapse directly into REM sleep, often at inopportune times.
Sleep Apnea
a sleep disorder characterized by temporary cessations of breathing during sleep and repeated momentary awakenings.
Night Terrors
a sleep disorder characterized by high arousal and an appearance of being terrified. only occur during NREM-3 sleep, within two or three hours of falling asleep, seldom remembered.
Dream
a sequence of images, emotions, and thoughts passing through a sleeping person’s mind.
Manifest content
according to Freud, the symbolic remembered story line of a dream.
Latent content
according to Freud, the underlying meaning of a dream
REM rebound
the tendency for REM sleep to increase following REM sleep deprivation
Hypnosis
a social interaction in which one person (the hypnotist) suggests to another (subject) that certain perceptions, feelings, thoughts, or behaviors will spontaneously occur.
Posthypnotic suggestion
a suggestion, made during a hypnosis session, to be carried out after the subject is no longer hypnotized. clinicians use this to help control undesired symptoms and behaviors
Psychoactive drugs
a chemical substance that alters perceptions and moods
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.
Withdrawal
the discomfort and distress that follow discontinuing an addictive drug or behavior.