surgical procedure extratemporal cortical resection true true https://www.ncbi.nlm.nih.gov/pubmed/7925156 An extratemporal cortical resection is an operation to resect, or cut away, brain tissue that contains a seizure focus. Extratemporal means the tissue is located in an area of the brain other than the temporal lobe. The frontal lobe is the most common extratemporal site for seizures. In some cases, tissue may be removed from more than one area/lobe of the brain.