EOG and EEG feature for train

After the patient arrived in the operating room, standard anesthetic monitoring and preoperative management were carried out. Patients were studied under three conditions: an awake condition (0.0% end-tidal concentration sevoflurane [Etsevo]), a “light” sedation condition (1.0±0.1% Etsevo, approximately minimum alveolar concentration [MAC]awake[3, 16]), and a “deep” sedation condition (3.0 ±0.1 % Etsevo, exceedingly 1 MAC[17]). EEG and EOG signals were recorded by ANT Neuro EEG equipment, including 3 EEG and 1 EOG channel in the 10-20 international system: Fp1, Fp2, Fpz, EOG. For recording EOG, two electrodes were placed above and below the right eye, and their difference was the vertical EOG (upper minus lower). EOG (PERA) and EEG (βratio and SampE) feature during three conditions for train.