electrocochleography electrocochleography electrocochleography (abbreviated ecochg or ecog) is a technique of recording electrical potentials generated in the inner ear and auditory nerve in response to sound stimulation, using an electrode placed in the ear canal or tympanic membrane. the test is performed by an otologist or audiologist with specialized training, and is used for detection of elevated inner ear pressure (endolymphatic hydrops) or for the testing and monitoring of inner ear and auditory nerve function during surgery. not to be confused with ecog or ecg. clinical applications the most common clinical applications of electrocochleography include: objective identification and monitoring of ménière's disease and endolymphatic hydrops (eh) intraoperative monitoring of auditory system function during surgery on the brainstem or cerebellum enhancement of wave i of the auditory brainstem response, particularly in patients who are hard of hearing diagnosis of auditory neuropathy cochlear physiology