Psychology / Unit 3 Psych 0316 short lesson, about 20 seconds
NREM Stage N3
Captions available
The idea
Stage N3 is deep slow-wave sleep, the hardest stage to wake from and the stage associated with physical restoration.
In practice
Someone woken from N3 is disoriented for minutes before becoming coherent.
Where people slip
N3 is concentrated in the first half of the night. Late-night sleep is not a smaller version of early sleep.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
Something wrong in this lesson? Flag it · Sources for Psychology