As you are being monitored by sleep researchers, almost all of your brain activity comprises delta brain waves. This is a clear sign that you are in:
A)stage 4 NREM.
B)REM sleep.
C)stage 2 NREM.
D)stage 1 NREM.

Question

Quizplus · Accepted Answer

Delta brain waves are typically associated with deep sleep, which occurs during stage 3 and 4 of NREM sleep. As almost all of the brain activity comprises delta waves, it is likely that the individual is in the deepest stage of NREM sleep, which is stage 4. Therefore, choice A is the best answer.

As You Are Being Monitored by Sleep Researchers, Almost All