Electrocorticographic Monitoring of Brain Retraction Injury (EMBRI)

"The patient will undergo their intracranial neurosurgical procedure as planned, using conventional brain retractors and neurosurgical equipment.~Standard neuromonitoring (EEG, MEP, SSEP) will be placed after the induction of neuroanaesthesia if indicated. Additional to whatever conventional EMBRI neuromonitoring is used, intraoperatively an ECoG array will be positioned under the retractor by the operating surgeon. Further electrode arrays may be placed on the cortical surface remote from the retractor as needed to establish a reference.~Typically we anticipate one ECoG array under the retractor blade with a reference array on an area of unretracted brain."