ECoG
Pronunciation: EE-kog
Also written as: ECoG — Electrocorticography
Electrocorticography, direct recording of electrical activity from the brain surface using electrode grids or strips.
Full Definition
Electrocorticography (ECoG) is a neurophysiological monitoring technique that involves placing electrodes directly on the surface of the brain cortex to record electrical activity. Unlike scalp EEG, ECoG provides higher spatial resolution and temporal precision by avoiding signal attenuation through the skull and scalp tissues. This invasive technique is primarily used in epilepsy surgery evaluation to precisely localize seizure foci and map eloquent brain areas (such as language and motor regions) before surgical resection. ECoG can be performed acutely during surgery or chronically with implanted electrode arrays for long-term monitoring. The procedure carries surgical risks but provides invaluable information for surgical planning and has contributed significantly to understanding brain function and connectivity.
Usage
Usage note: Distinguish from scalp EEG and specify acute versus chronic recording.
In Context
- "Intraoperative ECoG confirmed complete resection of the epileptogenic zone." — Surgical report
- "The chronic ECoG monitoring revealed seizure onset in the right temporal region." — Epilepsy evaluation