Stages of Sleep Flashcards
1
Q
What happens in stage 1?
A
Stage between wakefulness and sleep
Easily woken, hear noise
Eyes shut but flicker, drifting off
2
Q
What happens in stage 2?
A
Begins after about 10 minutes
Less responsive, sleeping soundly, if woken, won’t realise you’ve been asleep
Sleep spindles occur in the brain to keep you from waking
3
Q
What happens in stage 3?
A
Happens after 25 minutes
EEG shows delta waves increase
Very unresponsive, hard to wake
4
Q
What happens in stage 4?
A
Sleep walking and bed wetting
Sleep gets gradually deeper, delta waves dominate EEG recordings
Only loud noise or shaking could wake you
5
Q
What happens in stage 5?
A
90 minutes in, EEG pattern becomes mixed
Rapid eye movement, dreaming occurs
Rest of body doesn’t move, its paralysed
