Читать книгу Dental Management of Sleep Disorders - Ronald Attanasio - Страница 31

N3 sleep is what previously was known as NREM Stages 3 and 4. This has a unique and individually recognized EEG waveform known as delta waves, hence the term delta sleep, also referred to as slow wave sleep (SWS), deep sleep, or restorative sleep. This comprises about 20–25% of the total sleep time.