SLEEP STAGES

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4 cycle progression of electrical activity that is recorded by an EEC. Stage 1 is marked by drowsiness; stage 2 is light sleeping, stage 3 and 4 show delta waves and consists of deep sleep. These stages are interrupted by REM sleep.

SLEEP STAGES: "The 4 sleep stages occur more than once each sleep."
Cite this page: N., Sam M.S., "SLEEP STAGES," in PsychologyDictionary.org, April 13, 2013, https://psychologydictionary.org/sleep-stages/ (accessed December 2, 2021).

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