CLICK-EVOKED OTOACOUSTIC EMISSIONS IN A CHILD WITH UNILATERAL DEAFNESS

Citation
K. Welzlmuller et al., CLICK-EVOKED OTOACOUSTIC EMISSIONS IN A CHILD WITH UNILATERAL DEAFNESS, European archives of oto-rhino-laryngology, 250(6), 1993, pp. 366-368
Citations number
16
Categorie Soggetti
Otorhinolaryngology
ISSN journal
09374477
Volume
250
Issue
6
Year of publication
1993
Pages
366 - 368
Database
ISI
SICI code
0937-4477(1993)250:6<366:COEIAC>2.0.ZU;2-4
Abstract
In a 6-year-old boy with idiopathic unilateral deafness, click-evoked otoacoustic emissions were recorded in both ears with similar amplitud es and time courses. Following stimulation of the deaf ear, no compone nt of auditory-evoked brainstem potentials was recorded. No space-occu pying lesion was observed with high-resolution CT. At retest 1 year la ter these results were unchanged. In the deaf ear electrostimulation o f the cochlear nerve was performed using an ear canal electrode. At a stimulus current of 20 muA the body consistently reported hearing sens ation. Click-evoked otoacoustic emission indicated good outer hair cel l function. Hearing sensation at low stimulus intensities with electro stimulation indicated fairly good functions of the cochlear nerve. Con sidering also the results of imaging and auditory-evoked potentials, f indings suggested that the deafness was due to an inner hair cell diso rder.