Consciousness: Sleep Flashcards
What are five proposed reasons for our need for sleep??
(1) Sleep has survival value.
(2) Sleep helps us restore the immune system, heal from infection, and repair brain tissue.
(3) During sleep we consolidate memories.
(4) Sleep fuels creativity.
(5) Sleep plays a role in the growth process.
sleep
a periodic, natural loss of consciousness
circadian [ser-KAY-dee-an] rhythm
our biological clock
REM sleep
rapid eye movement sleep; a recurring sleep stage during which vivid dreams commonly occur.
alpha waves
the relatively slow brain waves of a relaxed, awake state.
hallucinations
false sensory experiences, such as seeing something without an external visual stimulus.
delta waves
The large, slow brain waves associated with deep sleep
suprachiasmatic nucleus (SCN)
a pair of cell clusters in the hypothalamus that controls circadian rhythm.
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 N3 sleep, within 2 or 3 hours of falling asleep, and are 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 storyline of a dream
latent content
According to Freud, the underlying meaning of a dream
