The stage of sleep in which delta waves begin to appear is __________ sleep.
A) N1
B) N2
C) N3
D) R

Question

Quizplus · Accepted Answer

Delta waves are low frequency, high amplitude brain waves that are characteristic of the deepest stage of non-REM sleep, also known as N3 sleep. Therefore, the correct stage of sleep in which delta waves begin to appear is N3 sleep (option C). N1 and N2 sleep are lighter stages of non-REM sleep, while REM sleep is a different type of sleep characterized by rapid eye movements and increased brain activity.

The Stage of Sleep in Which Delta Waves Begin to Appear