Unit 1 Sleep and Dreams
cycle through sleep stages every 90 mins
stuck in paralysis in paradoxical sleep
Beta waves: awake and alert
Alpha waves: awake and relaxed
getting out of REM sleep is most productive
Stages
N1
Hypnagogic (hypnic) hallucionations:
—> think about how you feel floaty and experience halluconations when about to fall alseep in class (dosing off)
emits theta waves
N2
20 minutes
sleep spindles
—> burts of ryth
emits theta waves
N3
deepest sleep
30 minutes
emits large slow delta waves
REM
increases as the night goes on and the longer you are asleep
REM rebound
—> REM sleep increases following REM deprivation
longer each cycle while sleeping and during hours 6-7 REM sleep is longests
Circadian rhythm
biological clock
regular bodily rythms
—> occur on a 24 hour cycle
lighting tells our body when its night and day
—>bright lights activate light-ensitive proteins to tell us day or night
—>tells it to increase melatonin production for evening (reduce morning)
body temp decreases while sleeping
—> think about how even when you are hot, while sleeping you still grab a blanket
Ways to measure brain acitivity
EEG (eletroencephalogram)
—> mainly used in sleep studies
Why we sleep
Restoration
Memory Consolidation
sorts out all the memories of the day
store it in the right areas
process everything
Sleep Deprivation and Sleep Disorders
Insomnia
difficulty or inability to fall sleep or stay alseep
usually affected by habits, or other diseases
Sleep Apnea
tempoary cessation,
dont know they wake up 247 while sleeping
snoring, choking, gasping for air
Narcolepsy
uncontrolled sleep attacks
directly into REM sleep
Dreams
Dream:
a sequence of images, emotions, and thoughts passing through a sleeping persons mind
Activation syntheisis theory
making sense of things
—> dreams are the results of us thinking about something and the brain makes sense
Consolidation theory
be sifiting through daily activities and storing memories, or moving memories in long term memory