[Correlation of the latency shift and brain stem potentials in basocochlear hearing loss and the time course of the click stimulus-induced evoked wave in the cochlea].
Frequency-specific information on high tone loss in the inner ear can, and if so only indirectly, be obtained from changes in latency of the click-evoked brain stem potential (ABR). The relationship between latency increases of the Jewett-wave-V in basocochlear hearing loss and the time course of the travelling wave on the basilar membrane will be presented. The latency increases of basocochlear hearing loss at 2 kHz, 1 kHz and 500 Hz correspond to both the computer-simulated time course of the travelling wave and to those of the derived responses. From a pathophysiological standpoint, receptor cells in basocochlear hearing loss are not functional, beginning at the oval window, so that, dependent on the degree of inactivity, a delay corresponding to that of the time course of the travelling wave passes until active hair cells are reached and action potentials released that produce, when summed up a potential of delayed latency.
Univ.-HNO-Klinik und Poliklinik rechts der Isar TU, München.
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Janssen
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Steinhoff
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Böhnke
D000161:Acoustic Stimulation / Q000379:methods; D001300:Audiometry, Evoked Response / Q000379:methods*; D001309:Auditory Threshold / Q000502:physiology; D001933:Brain Stem / Q000503:physiopathology*; D003055:Cochlear Microphonic Potentials; D003056:Cochlear Nerve / Q000503:physiopathology*; D005072:Evoked Potentials, Auditory; D006198:Hair Cells, Auditory / Q000503:physiopathology; D006316:Hearing Loss, High-Frequency / Q000503:physiopathology; D006319:Hearing Loss, Sensorineural / Q000503:physiopathology*; D006801:Humans; D011930:Reaction Time / Q000502:physiology*
Zusammenhang zwischen der Latenzverschiebung der Hirnstammpotentiale bei basokochleärer Schwerhörigkeit und dem Zeitverlauf der durch den Klick-Reiz ausgelösten Erregungswelle in der Kochlea.