Your mother apologized for waking you up with her phone call last night, but you are puzzled because you don't recall speaking to her. What type of sleep were you most likely experiencing when she called you?

Question

Quizplus · Accepted Answer

Stage 4 NREM is the deepest stage of sleep, where it is most difficult to be awakened and you are least likely to remember being disturbed.

Your Mother Apologized for Waking You Up with Her Phone