Fig. 3

a SEEG electrode implantation on lateral and medial view 3D brain of Patient 9. b Ictal SEEG trace and 2D T1-weighted sagittal images with 3D electrodes showing the key target points. It shows that the seizure onset was recorded from PrC (medial contacts of electrode D1–3) with no clinical sign being observed. When the seizure spreads to SMA (medial contacts of electrode F1–2), PrCG (lateral contacts of electrode F8–12), PCL (medial contacts of electrode K1–3), and PoCG (lateral contacts of electrode K10–14), the semiology of bilateral asymmetry tonic seizure appeared