ECoG — Electrocorticography

The intraoperative recording of potentials from the cortical surface. As part of an evaluation for epilepsy surgery, electrodes may be placed near the surface of the brain in a modality referred to variously as "electrocorticography (ECoG)", "intracranial EEG (I-EEG)" or "subdural EEG (SD-EEG)". Depth electrodes may also be placed into brain structures which are common epileptic foci and may not be "seen" clearly by scalp EEG.

Locate epileptogenic lesions

Locate brain regions e.g. speech

Brain mapping e.g. sensorimotor cortex

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