At what sleep stage does your breathing become more regular and your awareness of external stimulation decrease?

Question

Quizplus · Accepted Answer

During stage 2 sleep, breathing becomes more regular and there is a decreased awareness of external stimulation, such as noise or touch. REM sleep is characterized by rapid eye movement and a lack of muscle tone, while stages 3 and 4 are known as slow wave sleep and are characterized by deep sleep and a lack of consciousness of the external world.

At What Sleep Stage Does Your Breathing Become More Regular