Fig. 4

Different features for patient L1. From left to right and then from top to bottom: relative powers of \(\theta\) and \(\beta\), ERR, iCOH, SEF95, LZC and wSMI resp. represented in the y-axis. The recording lasted for around 24 h: from 15:44 until 15:50 the next day. The shaded areas represent the night time. Higher values of each feature are representative of higher levels of consciousness and inversely. The different features showed similar results, particularly a noticeable drop between the time frame delimited by the red rectangles in the figure, indicating a definite decrease of consciousness. The patient was certainly unconscious then