Table 1 The findings from the dynamic EEG improved in accordance with the patient’s condition

2022−9−6

The electroencephalogram (EEG) demonstrated a burst-suppression pattern. The burst segments were predominantly located on the left side, featuring slightly more medium amplitude sharp waves and sharp slow waves that were differently scattered in the frontal pole, as well as in the frontal, central, and parietal regions.

2022-9-14

A low-voltage trend was observed in the full leads, with the majority of leads showing this trend in VI-b and a minority of leads in VI-a.

2022−9−30

A low-voltage trend was observed in the full leads (with the majority of leads being VI-b and a minority being VI-a). There has not been much change, although there is a slightly increased presence of paroxysmal medium-amplitude slow waves (20–40 µV) compared to the last EEG.

2022−10−11

A low-voltage trend was observed in the full leads (with the majority of leads being VI-a and right occipital leads VI-b). Compared to the last EEG, there is slight improvement: there is increased low-amplitude fast wave activity with the eyes open and a slightly greater presence of low-amplitude spindle activity during sleep, particularly on the right side.

2022−11−5

A low-voltage trend was observed in the full leads. A few delta waves were sporadically present in the bilateral frontopolar, frontal, and anterior temporal regions during sleep, particularly on the left side. Frequent abnormal movements were detected; however, the EEG showed no abnormal waves (non-epileptic) during the same period. Therefore, subcortical tonic movements were considered.