Historically, sleep has been divided into one stage of rapid eye movement (REM) sleep and four stages (Stages 1–4) of non-rapid eye movement (NREM) sleep, characterized by increasing sleep depth.

Authors

• Person: Goran Medic, Micheline Wille, Michiel EH Hemels Organization: Dove Press
  Short- and long-term health consequences of sleep disruption

Sources

• Short- and long-term health consequences of sleep disruption www.dovepress.com Goran Medic, Micheline Wille, Michiel EH Hemels · Dove Press via serper

Referenced by nodes (3)

• REM sleep concept
• NREM sleep concept
• sleep concept