non-rapid eye movement sleep

By the time a child reaches one year of age, NREM sleep can be classified into different sleep stages. NREM is conventionally subdivided into three different stages on the basis of EEG criteria: stage 1, stage 2, and stage 3 (sometimes referred to…

As an individual matures into adulthood, an adult sleep pattern is established, characterized by the development of sleep-onset NREM sleep, the emergence of NREM sleep substages, the reduction or elimination of napping, and the decline of slow-wave activity. The usual temporal…

Other functional theorists agree that NREM sleep may be a state of “bodily repair” while suggesting that REM sleep is one of “brain repair” or restitution, a period, for example, of increased cerebral protein synthesis or of “reprogramming” the brain so that information achieved in wakeful functioning is most efficiently…

…eye movement (REM) sleep and non-REM, or slow-wave, sleep. During non-REM sleep an individual progresses from drowsiness through deeper and deeper levels of relaxation, with decreasing ability to be aroused; progressively slower waveforms appear on an electroencephalogram (EEG) during this phase. Periods of REM sleep, during which dreaming occurs, punctuate…