Project 1: Acoustic Plus Electric Hearing Preservation of residual acoustic hearing during cochlear implantation has become an important improvement in the performance of cochlear implants. Not only does it improve the performance of implants (particularly for noisy, real-world listening conditions) but also allows the treatment of patients with severe high-frequency hearing loss, who have substantial low-frequency hearing. This project proposes to continue this work on combining acoustic plus electric (A+E) hearing. In addition to the overall goal of improving patient care for hearing loss, several unique research opportunities arise from this work. The first opportunity arises because of the new population of patients that will be implanted with these A+E devices. Never before have patients with such high levels of pre-operative residual hearing been implanted in such a large- scale project. We are at the same time seeing levels of performance for the transmission of speech through the short electrode that are surprising in light of the previous literature. This will allow us to re-examine some of the commonly held beliefs about the limitations of electric stimulation due to channel interaction. The second opportunity arises because the short-electrode Hybrid implant assigns low- and mid-frequency speech bands to extreme basal locations in the cochlea. Thus we have a unique opportunity to study the effects of remapping, neural plasticity, and adaptation to highly-distorted place-frequency maps in the cochlea.
This research has the potential to continue to influence clinical practice. The new populations of patients will be implanted with hearing preservation devices will allow us to potentially expand the performance ceilings for all cochlear implants. The knowledge we gain regarding adapting to these new hearing preservation electrodes will influence the designs of implants in the future as well.
|Kim, Jeong-Seo; Tejani, Viral D; Abbas, Paul J et al. (2018) Postoperative Electrocochleography from Hybrid Cochlear Implant users: An Alternative Analysis Procedure. Hear Res 370:304-315|
|Goman, Adele M; Dunn, Camille C; Gantz, Bruce J et al. (2018) PREVALENCE OF POTENTIAL HYBRID AND CONVENTIONAL COCHLEAR IMPLANT CANDIDATES BASED ON AUDIOMETRIC PROFILE. Otol Neurotol 39:515-517|
|Bonnard, Damien; Schwalje, Adam; Gantz, Bruce et al. (2018) Electric and acoustic harmonic integration predicts speech-in-noise performance in hybrid cochlear implant users. Hear Res 367:223-230|
|Pimperton, Hannah; Walker, Elizabeth A (2018) Word Learning in Children With Cochlear Implants: Examining Performance Relative to Hearing Peers and Relations With Age at Implantation. Ear Hear 39:980-991|
|McMurray, Bob; Ellis, Tyler P; Apfelbaum, Keith S (2018) How Do You Deal With Uncertainty? Cochlear Implant Users Differ in the Dynamics of Lexical Processing of Noncanonical Inputs. Ear Hear :|
|McMurray, Bob; Danelz, Ani; Rigler, Hannah et al. (2018) Speech categorization develops slowly through adolescence. Dev Psychol 54:1472-1491|
|Klein, Kelsey E; Wu, Yu-Hsiang; Stangl, Elizabeth et al. (2018) Using a Digital Language Processor to Quantify the Auditory Environment and the Effect of Hearing Aids for Adults with Hearing Loss. J Am Acad Audiol 29:279-291|
|Roembke, Tanja C; Wiggs, Kelsey K; McMurray, Bob (2018) Symbolic flexibility during unsupervised word learning in children and adults. J Exp Child Psychol 175:17-36|
|Roland Jr, J Thomas; Gantz, Bruce J; Waltzman, Susan B et al. (2018) Long-term outcomes of cochlear implantation in patients with high-frequency hearing loss. Laryngoscope 128:1939-1945|
|Shearer, A Eliot; Tejani, Viral D; Brown, Carolyn J et al. (2018) In Vivo Electrocochleography in Hybrid Cochlear Implant Users Implicates TMPRSS3 in Spiral Ganglion Function. Sci Rep 8:14165|
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