The human sleep cycle consists of four distinct stages: Stage 1 (light sleep), Stage 2 (deeper sleep), Stage 3 (deepest sleep), and REM (rapid eye movement) sleep.

Authors

• Person: Not available Organization: Cleveland Clinic
  Sleep Deprivation: What It Is, Symptoms, Treatment & Stages

Sources

• Sleep Deprivation: What It Is, Symptoms, Treatment & Stages my.clevelandclinic.org Cleveland Clinic via serper

Referenced by nodes (1)

• REM sleep concept