Translations:Scheduling overview/3/en

From Polyphasic Sleep Wiki
Revision as of 08:30, 30 December 2020 by FuzzyBot (talk | contribs) (Importing a new version from external source)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)

Sleep is a complex phenomenon that causes physiological changes all over the body. However, it mainly affects the brain. According to the electrical activities in the brain, sleep is divided into rapid-eye movement (REM) and non-REM (NREM) stages. NREM sleep is further divided into three stages according to the frequency and amplitude of brainwaves.