Figure 1: Polysomnogram (PSG) of a patient with REM-sleep Behavior Disorder. From top to bottom: three EEGs, right and left eye movements, 2 wrists EMG left and right leg EMG, ECG, pulse oximetry, finger plethysmography, microphone (snore), nasal pressure transducer, oral thermistor, chest and abdomen plethysmography bands, intercostal EMG. The 60 seconds recording obtained during REM sleep, as demonstrated by the rapid eye movements and the EEG, shows an abnormal amount of time with elevated EMG activity recorded by different EMG leads. The microphone indicates the presence of vocalization. Patient tried to grab something while dreaming (video- documentation).