Non-Rapid Eye Movement

While asleep we go through various stages or cycles of sleeping. Most of the time we are in NREM sleep, when our eyes are more or less at rest, our brain waves are restful and without too much activity, and we do not produce narrative-based dreams. Any “dreaming” in this period is mostly non-sequential, isolated images and ideas that we often do not remember but the vaguest impressions of upon waking.