CC BY-NC-ND 4.0 · Journal of Neuroanaesthesiology and Critical Care 2017; 04(04): S9-S12
DOI: 10.4103/2348-0548.199942
Conference Proceeding
Thieme Medical and Scientific Publishers Private Ltd.

Intraoperative electrocorticography

Gabriela Alcaraz
1  Department of Anesthesia, Toronto Western Hospital, University Health Network, University of Toronto, Toronto, Ontario, Canada
,
Pirjo Manninen
1  Department of Anesthesia, Toronto Western Hospital, University Health Network, University of Toronto, Toronto, Ontario, Canada
› Author Affiliations
Further Information

Publication History

Publication Date:
08 May 2018 (online)

  

Abstract

Intraoperative electrocorticography (ECoG) is the recording of electrophysiological activity from electrodes placed directly on the exposed surface of brain, during surgery for epilepsy and tumor resection. The ECoG is helpful in defining the seizure onset and spread within the cortical surface and delineation of the interface between epileptogenic zones and functional cortex substance of the brain. Intraoperative ECoG is an invasive procedure, it is performed during surgery mostly commonly during awake craniotomy but at times during general anaesthesia. As most anesthetic agents will affect ECoG, they should be minimized or stopped prior to any recording. Activation of intraoperative epileptiform activity may also be required if there are no spontaneous discharges. The appropriate management of the anesthetic during the time of ECoG is critical for its success. There are limitations and some controversies to all the uses of intraoperative ECoG, thus each center will set their own indications, criteria, and protocols.