Figure 4
Presurgical data from a patient with drug-resistant seizures and minimal weakness of the left hand: (A, B) T2-weighted axial MRI sequences showing extensive encephalomalacia over the right hemisphere with relatively preserved motor cortex; (C) postoperative axial FLAIR image following hemispherectomy with preservation of motor cortex; (D) interictal EEG showing relative suppression of background activity over the right hemisphere with bifrontal spike-and-wave discharges which appeared more prominent over the left frontal region; and (E) ictal EEG showing diffuse attenuation of background activity for one second, followed by appearance of diffuse 14-Hz activity. The patient was seizure-free for two years without any additional motor deficits.