Fig. 1

MRI and video EEG in patient 1. a Cerebral MRI revealed an abnormal gray signal (arrows) in the semiovale located in the left parietal-occipital lobe of the patient. b–d Video EEG showed spasm attacks (b), and focal seizures starting in the left occipital region (c). Normal EEG activity recorded 1 year after surgical resection (d)