Psychology - stages of sleep Flashcards
How many stages of sleep ?
5
N1
N2
N3
N4
REM
N - represents non-REM sleep
which waves are present N1 ?
high amplitude alpha waves at the beginning and later on theta waves
stage 1 (N1) - time ?
lightest sleep - 10 min
what happens in the stage 1 to our body
bodily processes start to slow down, heartbeat etc
which wave characterize our sleep?
alpha waves - highest frequency - we can be easily awoken
stage 2 (N2) - time ?
light sleep - 20 min
which wave dominant N2 ?
theta waves
what happens to our body N2
continuing of slowing bodily functions
Brain starts to produce sleep spindles
Presence of K-complexes
sleep spindles
bursts of rapid rhythmic brain wave activity
important for learning and memory
K-complexes
high amplitude brain activity in response to environmental stimuli
Stage 3 and 4 - time
deep sleep
slow wave sleep
20 - 40 min
what waves are present N3 AND N4 ?
delta waves
what happens to our body at N3 AND N4 ?
hard to awaken
super relaxed
heart beat lowest
HGH human growth hormone
which stage does “sleepwalking and night terrors” occur ?
N3
Stage 5 - time
REM sleep - rapid eye movements
deepest stage of sleep
almost complete paralysis of the body - motor neurons are completely inhibited
