Electrocochleography
Electrocochleography (pronunciation: e-lek-tro-kok-le-og-raphy) is a medical procedure used to evaluate the cochlea's electrical potentials. It is often abbreviated as ECochG or ECoG.
Etymology
The term "Electrocochleography" is derived from three words: "Electro," referring to electricity, "Cochleo," referring to the cochlea in the inner ear, and "graphy," which means to write or record in Greek.
Procedure
Electrocochleography involves the use of an electrode placed in the ear canal or tympanic membrane, or through the tympanic membrane to the promontory of the middle ear. This electrode records the electrical activity in the cochlea and the auditory nerve during sound stimulation. The recorded data is then graphed, allowing for the analysis of various waveforms.
Uses
Electrocochleography is primarily used to diagnose Meniere's disease, a disorder of the inner ear that can lead to dizziness and loss of hearing. It can also be used to assess the function of the cochlea and the auditory nerve, particularly in cases of sensorineural hearing loss.
Related Terms
- Cochlea: The spiral-shaped part of the inner ear that is responsible for converting sound vibrations into nerve impulses.
- Tympanic membrane: Also known as the eardrum, it vibrates in response to sound waves and transmits these vibrations to the inner ear.
- Promontory: A protrusion in the middle ear formed by the first turn of the cochlea.
- Meniere's disease: A disorder of the inner ear that can lead to dizziness and loss of hearing.
- Sensorineural hearing loss: A type of hearing loss resulting from damage to the inner ear or the auditory nerve.
External links
- Medical encyclopedia article on Electrocochleography
- Wikipedia's article - Electrocochleography
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