Fig. 1
From: Monitoring of anesthetic depth and EEG band power using phase lag entropy during propofol anesthesia
Illustration of electroencephalogram (EEG) channels and phase difference sign measurement. a PLEM™ measures the phase lag entropy (PLE) value. The PLE electrode array consists of electrodes positioned approximately at FP1 (L1), FP2 (R1), AF5 (L2), and AF6 (R2). The ground electrode is at FPZ (G), and the reference electrode is at T3 of the temporal area of the face (T). b Both sensors are placed on the left temporal-frontal area with the bispectral index (BIS) sensor placed above the PLE sensor. Permitted for the copyright for PLEM™ monitor image [15, 01, 2020] by Copyright Holder (InBody co., ltd)