PMC8352636_01
Case 1 - awake (A) vs NREM (B) (monopolar montage).
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His EEG at 3.5 and 6.5 years after the first and second events, respectively, revealed normal background activity during wakefulness and repetitive high voltage tangential dipoles with frontal/central positivity and the main negative peak bi-occipitally maximal in the left occipital area, showing marked drowsiness and sleep activation (Figures 1 and 2).
Case 1 - awake (A) vs NREM (B) (bipolar montage).
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His EEG at 3.5 and 6.5 years after the first and second events, respectively, revealed normal background activity during wakefulness and repetitive high voltage tangential dipoles with frontal/central positivity and the main negative peak bi-occipitally maximal in the left occipital area, showing marked drowsiness and sleep activation (Figures 1 and 2).
Case 1 - Fixation-off sensitivity.
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Case 1 - FLAIR ax, T2 ax.
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PMC8352636_02
Case 2 - NREM 3 y.o. (A) vs 5 y.o. (B) (bipolar montage).
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In repeated EEG examinations 2 years later the prior left centro-temporo-parieto-occipital focus shifted forward and was localized at centro-temporal area while right centro-parieto-occipital one was not visualized (Figure 5).
Case 2 - awake 5 y.o. (ipsilateral mastoid reference montage).
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Case 2 - FLAIR ax, T2 ax.
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