Читать книгу Dental Management of Sleep Disorders - Ronald Attanasio - Страница 28

NREM sleep initially was broken down into four distinct stages based on EEG activity: Stage 1, Stage 2, Stage 3, and Stage 4. In 2007, a revised method of staging was adopted and NREM Stages 3 and 4 are now viewed as one stage [4]. The stages of NREM are now defined as follows: