Our current standard practice is to use a lateral approach through the middle temporal gyrus to place 3 depth electrodes targeting the hippocampus for intraoperative verification of pathological epileptiform activity prior to resection. Our research protocol will add one FDA approved electrode that has a central cannula for insertion of a microdialysis probe. The electro-physiological data that will be gathered is not altered and this methodology will not impact standard clinical care, except and will not to extend the duration in the OR - the measurements will occur during the clinical electrocorticography (ECoG; intracranial electroencephalography (iEEG)) procedure by 15 min.

Our current standard practice is to use a lateral approach through the middle temporal gyrus to place 3 depth electrodes targeting the hippocampus for intraoperative verification of pathological epileptiform activity prior to resection. Our research protocol will add one FDA approved electrode that has a central cannula for insertion of a microdialysis probe.

Presence of protein in the microdialysate