Fig. 1.
Study diagram showing time points loss of consciousness (LOC), skin incision, burst suppression (BS), and return of consciousness (ROC) and phases of concentration increase and decrease. We performed data analysis at selected time points reflecting (A) the transition between consciousness (phase 1, time points LOC −15 s and ROC + 30 s) and unconsciousness (phase 0, LOC + 30 s and ROC −15 s,) and (B) levels awake (phase 2, LOC −180 s, ROC + 30 s), anesthesia according to clinical practice (phase −1, skin incision −60 s, end decrease +30 s) and BS (phase −3, end increase +30 s, start decrease −60 s).