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. 2020 Jul 10;8:2324709620940497. doi: 10.1177/2324709620940497

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© 2020 American Federation for Medical Research

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Figure 5. — (A) Generalized slowing with no epileptiform discharges. (B) Build-up of generalized rhythmic delta and sharp activity. (C) Clear-cut epileptiform discharges seen with longitudinal bipolar montage. (D) Same EEG tracing shown above displayed using transverse bipolar montage. (E) Epileptiform discharges start to break up and dissipate. (F) Next epoch with epileptiform discharges reappearing after <1 hour. Selected continuous electroencephalography epochs with compressed spectral array map (see line marker) showing waxing-waning cortical hyperexcitability. Sustained periods of generalized slowing with no epileptiform discharges (A) are followed by build-up of rhythmic delta and sharp wave activity (B) that evolve into clear-cut epileptiform discharges, as seen using longitudinal bipolar (C) and transverse bipolar montages (D), persisting over 1 to 4 hours, before breaking up and dissipating (E), only to return (F).