Rip's EEG indicates that he has entered delta sleep.We can expect that:
A) his brain will be emitting sleep spindles
B) he has just fallen asleep
C) he would be very difficult to awaken
D) he is about to wake up

Question

Quizplus · Accepted Answer

Delta sleep is the deepest stage of non-REM sleep, characterized by a slow wave EEG pattern. During this stage, it would be very difficult to awaken Rip. Option A is incorrect because sleep spindles are characteristic of stage 2 of non-REM sleep, which precedes delta sleep. Option B is also incorrect because delta sleep occurs after 20-30 minutes of falling asleep, not immediately after. Option D is incorrect because delta sleep is not the stage immediately preceding waking up; it typically occurs during the first half of the night.

Rip's EEG Indicates That He Has Entered Delta Sleep