Fig. 4

a SEEG electrode implantation on lateral and medial view of 3D brain of Patient 3. 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 a relatively focal region of PrC (middle contacts of electrode C4–7 and mesial contacts of electrode E1–3). It is only when the seizure spreads to PoCG (lateral contacts of electrode H11–14) and SMA (medial contacts of electrode L1–3), that the semiology of BATS appears