Article
Evolution of electrically evoked auditory potentials in implanted children
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Published: | May 31, 2005 |
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In order to evaluate possible modifications of electrically evoked auditory potentials, we recorded eABR intra-operatively and at least after the first year of implant use in each of 20 children. All children received an MXM Digisonic Cochlear Implant. The onset of deafness was prelingual for all children. The eABR were recorded in all cases (intra and post-operatively) and latences and amplitude of wave eIII and eV were noted. Latency of eV component decreased significantly (p<0.01) moving from 4.21 msec +/- 0.4 msec to 4.01 msec +/- 0.2 msec as well as the interlatency eIII-eV. Amplitude of eV showed significant increase (p<0.05). Even if not statistically significant, we found a trend toward decreasing latencies of eV (delta=0.3 msec) with increasing current level of stimulation. We detected significant modifications of eABR components in implanted children with at least one year of implant use. These results may reflect changes in neural synchrony, conduction velocity but also in auditory processing.