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PMC8495099_02
Case 2 a). Subdural EEG at onset of left abdominal wall seizure. Selected channels from 20 contact grid. Note new rhythm at contacts 20,15,14.(EEG channels: Sens = 20 microvolts/mm; LFF = 1; HLF = 100 Hz)b) Same seizure; 30 seconds after onset c) Same seizure; termination 80 sec after onset d) Axial MRI and position of subdural grid. Contacts 20, 15, 14 in red.
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These movements correlated with a very spatially restricted ictal intracranial EEG rhythm (see Fig. 2).
PMC8495099_03
Case 3 MRI Brain on initial presenting a) T2 Axial b) T1 Axial c) T1 Axial Post-Gadolinium Lesion in left parietal lobe abutting the left post-central gyrus. T2 Hyperintensity with T1 hypointensity is demonstrated with a lack of gadolinium enhcancement, consistent with a low-grade glioma. The patient later underwent resection of this lesion and pathology disclosed a grade II oligodendroglioma.
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MRI demonstrated a left parietal lesion consistent with a low-grade glioma (see Fig. 3).