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Sleep

Terms in this set (16)

Circadian Rhythm
our biological clock; regular bodily rhythms (for example, of temperature and wakefulness) that occur on a 24-hour cycle
REM Sleep
Rapid eye movement sleep, a recurring sleep stage during which vivid dreams commonly occur. Also known as paradoxical sleep, because the muscles are relaxed (except for minor twitches) but other body systems are active.
Alpha Waves
the relatively slow brain waves of a relaxed, awake state
NREM sleep
non-rapid eye movement sleep; encompasses all sleep stages except for REM sleep
Hallucinations
false sensory experiences, such as seeing something in the absence of an external visual stimulus
Hypnagogic Sensations
bizarre experiences, such as jerking or a feeling of falling or floating weightlessly, while transitioning to sleep
Delta Waves
the large, slow brain waves associated with deep sleep
Suprachiasmatic nucleus
a pair of cell clusters in the hypothalamus that controls circadian rhythm, it responds to light-sensitive retinal proteins; causes pineal gland to increase or decrease production of melatonin, thus modifying our feelings of sleepiness.
Insomnia
recurring problems in falling or staying asleep
Narcolepsy
A sleep disorder characterized by uncontrollable sleep attacks. The 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; unlike nightmares, night terrors occur during Stage 4 sleep, within two or three hours of falling asleep, and are seldom remembered
Dream
a sequence of images, emotions, and thoughts passing through a sleeping person's mind. Dreams are notable for their hallucinatory imagery, discontinuities, and incongruities, and for the dreamer's delusional acceptance of the content and later difficulties remembering it.
Manifest Content
according to Freud, the 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 (created by repeated awakenings during REM sleep)
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