Final answer:
In Stage 3 of NREM sleep, delta waves are prevalent and signify deep sleep with muscle relaxation, vital for restorative function.
Explanation:
In Stage 3 of NREM sleep, the most prevalent brain waves are delta waves. These delta waves are characterized by low frequency and high amplitude, marking a deep sleep state with significant muscle relaxation.
Delta waves are associated with slow-wave sleep, which is essential for physical and mental restoration during sleep cycles.
This stage of NREM sleep, with delta waves, plays a crucial role in overall sleep quality and well-being.
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