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Normal rapid eye movement sleep on polysomnography

Normal rapid eye movement sleep on polysomnography
PSG 30-second epoch of normal REM sleep. REM are noted in the dashed box. Note the absence of movements in the chin and bilateral leg EMG derivations.
ABD: abdominal effort; C4M1: central EEG electrode; CEMG: chin EMG; CFlow: nasal airflow; CPAP: continuous positive airway pressure; ECG1: electocardiogram; EEG: electroencephalogram; EMG: electromyogram; F4M1: frontal EEG electrode; LEOGM2: left electrooculogram; LTLEG: left leg; MSnore: snoring microphone; O2M1: occipital EEG electrode; PSG: polysomnogram; PulseR: pulse rate; REM: rapid eye movements; REOGM2: right electrooculogram; RTLEG: right leg; RWA: REM without atonia; THO: thoracic effort; s: seconds; SpO2: peripheral oxygen saturation.
Graphic 104914 Version 2.0