What it looks like
Low-amplitude, mixed-frequency EEG resembling drowsiness, with rapid eye movements, low chin EMG tone and runs of 2–6 Hz sawtooth waves over the central region. 10
What it means at the bedside
Rapid lateral eye movements appear as out-of-phase deflections at F7 and F8. REM within minutes of sleep onset on a routine EEG suggests sleep deprivation, drug withdrawal or narcolepsy.