Unit 2 sleep and dreaming Flashcards
(32 cards)
Circadian Rhythm -
the biological clock; regular bodily rhythms
suprachiasmatic nucleus
controls your circadian rythm
melatonin
the sleep hormone - into the bloodstream
if all time cues are removed how long is our circadian rythm
25 hours
Beta waves
awake, alert, anxious - quick, rapid
alpha waves
relaxed, ready for sleep (may see hallucinations just before falling asleep)
Theta waves
stages 1 and 2 of NREM sleep
delta waves
deep sleep; stage 3 of NREM – At some point we shift from being awake to sleep, but we do not perceive that moment
sleep pattern
Roughly 90-minute segments and you have about 4-6 cycles per night
NREM 1-
½ awake / ½ asleep
NREM 2-
light sleep - associated with sleep talking
-sleep spindles
sleep spindles
K-complexes - large, high-voltage waves that often appear in response to such outside stimuli as sounds
They help protect sleep by blocking out external noises and disturbances.
They’re linked to learning and memory, especially in moving short-term memories into long-term storage.
More spindles can mean better cognitive abilities like reasoning and problem-solvi
NREM 3-
Deep Sleep
Hormones for growth in children, Immune system refreshes itself
REM sleep
rapid eye movement sleep; a recurring sleep stage during which vivid dreams commonly occur
what type of waves occur during REM sleep
beta
as night goes on what changes occur in our sleep cycle?
NREM 3 diminishes and eventually disappears. and REM sleep gets longer.
REM rebound
when you go into extra REM sleep after not getting enough of it before.
Sleep deprivation
occurs when an individual fails to get enough sleep. Can cause memory loss, weak immune system, weight gain, reduced energy, etc
why do we sleep?
Helps restore health and efficiency, Sleep helps us to process & consolidate new memories, helps us replay and process stressors from the day through dreaming
dreams
include all images, events, sounds, and other sensations experienced during sleep
manifest content
what we recall from the “storyline” of our dreams
latent content
underlying meaning of the dream
wish fulfilment theory
Dreams are the key to understanding our inner conflicts.
information processing theory
Dreams act to sort out and understand the memories that you experience that day.
