isBrainConnectivityFor epilepsy physiological assay Electrocorticography true true Electrocorticography ECoG CTRP Electrocorticography https://www.ncbi.nlm.nih.gov/pubmed/25204010 C0430797 The use of electrodes placed directly on the exposed brain surface to record the electrical activity of the cerebral cortex. Noachter 1999 Electrocorticography ECoG C116664 Diagnostic Procedure Electrocorticography