REM sleep

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  • Presence of rapid eye movements
  • Muscle atonia (in REM sleep behavior disorder there is no muscle atonia)
  • Lower voltage background activity with theta and beta, resembling wakefulness.
  • Normale latency to REM sleep is around 100 minutes
  • Presence of REM sleep during a routine EEG is abnormal and could be in the context of sleep onset rapid eye movement (SOREM)