Which of the following stages of non-rapid eye movement (NREM)sleep is considered the deepest level of sleep?
A)Stage one
B)Stage two
C)Stage three
D)Stage four
E)None of the selections are correct.

Question

Quizplus · Accepted Answer

Stage four is the deepest level of NREM sleep, also known as slow-wave sleep, characterized by slow brain waves, relaxed muscles, and a decreased heart rate. It is the most restorative stage of sleep, and disruptions to this stage can lead to feelings of grogginess and fatigue upon waking up. However, some researchers believe that splitting stage three and stage four into separate stages may be more accurate.

Which of the Following Stages of Non-Rapid Eye Movement (NREM)sleep