Table 2 Epilepsy surgery evaluation before lesionectomy
From: Ganglioglioma surgery associated with postoperative status epilepticus: a case report
Seizure type | Focal onset left motor seizures to bilateral tonic clonic. Impaired and non- impaired awareness |
|---|---|
Seizure frequency | 20 seizures per week |
Symptomatogenic zone | Right frontal lobe |
Radiology | Structural lesion in the right supramarginal gyrus |
Irritative zone | Surface EEG: Initially normal. Development of interictal spikes in the right frontocentral lobe, and later bilateral spikes Dipole analysis: Right motor area |
Ictal onset zone | Video surface EEG: Right frontal lobe Video EEG with subdural grid: Right supramarginal gyrus with spread to the frontal central areas |
Functional deficit zone | Face memory test decrement > 2.5 standard deviations, otherwise normal or supranormal results in neuropsychology evaluation |
Functional investigation | Functional MRI: Motor and sensory activity of the tongue, in direct relation to the lesion Functional-stimulation subdural grids: Sensory symptoms in the left hand and motor symptoms of the tongue near the lesion in the right supramarginal gyrus |
Epileptogenic zone | Preoperatively presumed to be the lesion and adjacent perilesional area in the right supramarginal gyrus |