unit 2 : sleep patterns Flashcards
(25 cards)
circadian rhythm
- biological clock, causes changes in energy & temp
REM sleep (paradoxical)
- rapid eye movement sleep
- reoccurring sleep stage where vivid dreams commonly occur
what waves occur when your awake & relaxed?
alpha waves
what waves occur when your alert / waking up?
beta waves
what waves occur when you’ve just fallen asleep? (NREM-1)
theta waves
what waves occur when you could be easily awakened but asleep? (NREM-2)
sleep spindles , or possibilbly delta waves
what waves occur when your in deep sleep?
delta waves
how long does a sleep cycle last?
90 minutes
suprachiasmatic nucleus (SCN)
cell clusters in the hypothalamus that controls circadian rhythm & causes pineal gland to adjust melatonin
pineal gland
adjusts melatonin production in response to SCN & light
melatonin
sleep-inducing hormone
evolutionary benefit to sleep
protection
biological benefit of sleep
restore & repair brain tissue / neurons (glial cells)
biological & cognitive benefit to sleep
strengthens & stabilizes neural memory
cognitive benefit of sleep
promotes creative thinking, problem solving
benefit of sleep : growth process
pituitary gland releases a growth hormone
effects of sleep deprivation
- release of hormone ghrelin, makes you hungry = fatter
- sleep debt, less energy
- irritability
sleep debt
the amount of sleep minus the amount you actually get (ex : 8-6 = 2)
insomnia
persistent problem of falling & staying asleep
narcolepsy
suddenly attacks of overwhelming sleepiness. lasting less than 5 minutes
(REM sleep)
sleep apnea
being temporarily unable to breathe while sleeping which causes “snoring” often not remembered.
night terrors
intense episodes of fear during NREM-3 sleep, typically occurring in children. no memory afterwards
REM rebound
the tendency for REM sleep to increase following REM sleep deprivation
freud’s wish fulfillment
dreams express unconscious desires
