Definitions for "Slow wave sleep"
Keywords:  sleep, delta, brainwaves, eeg, stage
Periods of deep sleep characterized by large, slow brain waves, or delta waves. Believe by some to represent physically restorative periods of sleep.
This refers to quote “stage 3” or “stage 4” sleep. This is where the brainwaves are the slowest and the sleep is most beneficial. Sufferers of sleep apnea have little or no slow wave sleep. They tend to spend a lot of time in stage 1 or stage 2, which is not near as beneficial.
synonymous with sleep stages 3 and 4.