Peter is in a deep sleep and his brain wave pattern consists of low-frequency delta waves. Which stage of sleep is Peter experiencing?

Question

Quizplus · Accepted Answer

Low-frequency delta waves are typical of deep sleep, which occurs in stage 3 or 4 of the sleep cycle. REM sleep is characterized by high-frequency brain waves similar to those found in wakefulness, while stages 1 and 2 are lighter stages of sleep with higher-frequency brain waves.

Peter Is in a Deep Sleep and His Brain Wave