Final Flashcards
What is sleep paralysis?
Strange experience of being unable to move just before falling asleep or immediately upon waking up
What is consciousness?
Your subjective experience of the world and ourselves
What is the circadian rhythm?
The cyclical changes that occur roughly on a 24-hour basis in many biological processes such as hormone release, brain waves, body temperature, and drowsiness
What is our biological clock?
Also called our circadian rhythm
What is rapid eye movement?
Also called REM, is the darting of the eyes underneath closed eyelids during sleep
What is non-REM sleep?
Also called NREM, is stages 1 through 4 of the sleep cycle, during REM does not occur and dreaming is less frequent and vivid
What is Stage 1 sleep?
Light stage of sleep, last 5-10 minutes. Brain activity powers down by 50% or more, producing theta waves. Also may experience sudden jerks (myoclonic jerks) of our limbs, often confused
What is stage 2 sleep?
Brain waves slow down even more, sudden intense bursts of electrical activity called sleep spindles, and occasional sharply rising and falling waves known as K-complexes first appear. Heart rate slows, body temperature decreases, muscles relax even more, eye movement cease, spend 65% of our sleep here
What is stage 3 and 4 sleep?
Much slower sleep waves called delta waves, appears 20-50% in stage 3, and over 50% in stage 4. Delta sleep is needed to feel well rested for the next day
What is stage 5 sleep?
High frequency, low amplitude waves resembling those of wakefulness, dreams happen here, after 10-20 minutes the cycle starts again
What is lucid dreaming?
Experience of becoming aware that one is dreaming
What is insomnia?
Difficulty falling or staying asleep, in the forms:
- Having trouble falling asleep (taking more than 30 minutes) - Waking too early in the morning - Waking during the night and having troubles returning to sleep
What is narcolepsy?
Dramatic disorder in which people experience episodes of sudden sleep lasting anywhere from a few seconds to an hour
What is orexin?
Hormone that plays a key role in triggering sudden attacks of sleepiness
What is sleep apnea?
Sleep disorder that is caused by a blockage of the airway during sleep
What are night terrors?
Typically harmless events that occur almost exclusively in children
What is sleepwalking?
Walking while fully asleep, often involves relatively little activity