Fig. 2.

Baseline (A) and follow-up (B) electroencephalogram (EEG) recording with surface electromyography (EMG) recording of case 2. A Baseline EEG showing lateralized periodic discharges (diffuse spike and spike-and-slow-wave complexes at 2–3 Hz and 100–150 μV of amplitude) synchronous and asynchronous with diaphragm myoclonic jerks shown in surface EMG recording. B Follow-up EEG after levetiracetam 1000 mg twice daily showing diffuse spike and spike-wave complexes with a clear change in amplitude (up to 90 μV) and frequency (1–2 Hz). No myoclonic jerk at diaphragm has been detected as shown in the surface EMG recording. EOG, electro-oculogram; EMG1, right hemidiaphragm electrode; EMG2, left hemidiaphragm electrode