Transtympanic electrocochleography was carried out on 18 syphilitic patients (30 ears were tested) most of whom were suffering from the late onset congenital form of the disease. A diphasic action potential with a large negative summating potential on the descending limb was found in 77.7% of ears; the cochlear microphonic potential was always of small amplitude. While these findings are not pathognomonic of syphilis, they are characteristic and may be explained on pathological grounds.
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ElberlingCSalomonG: Electrical potentials from the inner ear in man in response to transient sounds generated in a closed acoustic system. Rev Laryngol Otol Rhinol (Bord)Suppl: 691–707, 1971.
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BeagleyHAHuttonJNTHayesRA: Clinical electrocochleography: A review of 106 cases. J Laryngol Otol88: 993–1000, 1974.
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CrowleyDEDavisHBeagleyHA: Survey of the clinical use of electrocochleography. Ann Otol Rhinol Laryngol84: 297–309, 1975.
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