In combination, stage 3 NREM and stage 4 NREM:
A) occur mostly during the second half of the night.
B) are called paradoxical sleep.
C) are comprised mostly of beta brain wave activity.
D) are referred to as slow-wave sleep.

Question

Quizplus · Accepted Answer

Stage 3 NREM and stage 4 NREM together are referred to as slow-wave sleep because they are characterized by slow, high-amplitude brain waves. These stages occur mostly during the first half of the night, unlike REM sleep which occurs mostly during the second half. Paradoxical sleep refers to REM sleep, not NREM sleep, and beta waves are characteristic of wakefulness or REM sleep, not NREM slow-wave sleep.

In Combination, Stage 3 NREM and Stage 4 NREM