Definitions for "NON-REM SLEEP"
Keywords:  rem, nrem, sleep, rapid, stage
Non-Rapid Eye Movement sleep, or NREM, is the first general phase of sleep consisting of 4 stages ranging from light stage of sleep to deep stages of sleep. Non-REM sleep accounts for over half of an average night's sleep.
stages of sleep without rapid-eye movement that make up about three-quarters of each night's sleep.
Usually divided into four stages.