Electrocorticography (ECoG), or intracranial EEG (iEEG), is the practice of using electrodes placed directly on the exposed surface of the brain to record electrical activity from the cerebral cortex. ECoG may be performed either in the operating room during surgery (intraoperative ECoG) or outside of surgery (extraoperative ECoG). Because a crani...
technique for investigating the electrical activity of the brain, based on the recording and interpretation of the electrocorticogram
The technique of recording the electrical activity of the cerebral cortex by means of electrodes placed directly on it. ... (05 Mar 2000) ... 
(e-lek″tro-kor″tĭ-kog´rә-fe) electroencephalography with the electrodes applied directly to the cerebral cortex.
(ECoG) Type: Term Pronunciation: ē-lek′trō-kōr′ti-kog′ră-fē Definitions: 1. The technique of recording the electrical activity of the cerebral cortex by means of electrodes placed directly on it.
a technique for surveying the electrical activity of the cerebral cortex by means of an electroencephalograph and electrodes attached to the brain.