Figure 3:

a) Intraoperative view status post left frontotemporoparietal craniotomy showing recording electrode placement. b) Scout view demonstrating intracranial monitoring grid and strip electrodes. c) Three dimensional reconstruction showing placement of grid and three strip electrodes utilized for electrocorticography. d) Intraoperative view showing replacement of grid and strip electrodes with two strip electrodes over the motor cortex and parietal seizure foci. Note that prior to permanent placement of the electrodes the tunneling channel is present so that this manipulation is not performed with permanent electrodes in place (metal tube in picture at 10 o’clock) e) Scout view demonstrating two strip electrodes over the motor cortex and parietal seizure foci.