Deep sleep is often known as sluggish-wave sleep (SWS) and delta sleep due to the forms of brain waves manufactured during this phase in the sleep cycle. Lower-frequency delta waves characterize the N3 phase. Your brain waves adjust for the duration of this sleep cycle. They get slower, for http://dominickcvmhx.blogstival.com/34271804/how-much-you-need-to-expect-you-ll-pay-for-a-good-deep-sleep