Electrocochleography
Pronunciation: ih-lek-troh-kok-lee-OG-ruh-fee
Also written as: ECochG — Electrocochleography
An electrophysiological test that records electrical potentials generated by the cochlea and auditory nerve in response to sound, primarily used to diagnose endolymphatic hydrops and Ménière's disease.
Full Definition
Electrocochleography (ECochG or ECoG) measures the summating potential (SP) and action potential (AP) generated by the hair cells and eighth cranial nerve of the inner ear. An electrode is placed on or near the tympanic membrane or promontory, and click or tone-burst stimuli are delivered. An elevated SP/AP amplitude ratio is considered a marker of endolymphatic hydrops, a hallmark of Ménière's disease. Editors should note that both 'ECoG' and 'ECochG' are accepted abbreviations; the document should use one consistently. The term should not be shortened to 'cochleography' or confused with electromyography (EMG).
Usage
Usage note: 'ECoG' is also used for electrocorticography in neurosurgery; editors working on interdisciplinary documents must disambiguate.
In Context
- "Electrocochleography revealed an elevated SP/AP ratio of 0.45, consistent with endolymphatic hydrops." — Otology diagnostic report
- "The abbreviation 'ECoG' was used throughout; verify this does not conflict with electrocorticography, which shares the same acronym in neurology contexts." — Cross-disciplinary editorial check