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.

Public Health Relevance

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.

Agency
National Institute of Health (NIH)
Institute
National Institute on Deafness and Other Communication Disorders (NIDCD)
Type
Specialized Center (P50)
Project #
5P50DC000242-28
Application #
8606842
Study Section
Special Emphasis Panel (ZDC1-SRB-L)
Project Start
Project End
Budget Start
2014-02-01
Budget End
2015-01-31
Support Year
28
Fiscal Year
2014
Total Cost
$206,145
Indirect Cost
$67,345
Name
University of Iowa
Department
Type
DUNS #
062761671
City
Iowa City
State
IA
Country
United States
Zip Code
52242
Abbas, Paul J; Brown, Carolyn J (2015) Assessment of responses to cochlear implant stimulation at different levels of the auditory pathway. Hear Res 322:67-76
Driscoll, Virginia; Gfeller, Kate; Tan, Xueli et al. (2015) Family involvement in music impacts participation of children with cochlear implants in music education and music activities. Cochlear Implants Int 16:137-46
Kopelovich, Jonathan C; Reiss, Lina A J; Oleson, Jacob J et al. (2014) Risk factors for loss of ipsilateral residual hearing after hybrid cochlear implantation. Otol Neurotol 35:1403-8
Oleson, Jacob J; Cavanaugh, Joseph E; Tomblin, J Bruce et al. (2014) Combining growth curves when a longitudinal study switches measurement tools. Stat Methods Med Res :
Tokita, Joshua; Dunn, Camille; Hansen, Marlan R (2014) Cochlear implantation and single-sided deafness. Curr Opin Otolaryngol Head Neck Surg 22:353-8
Dunn, Camille C; Walker, Elizabeth A; Oleson, Jacob et al. (2014) Longitudinal speech perception and language performance in pediatric cochlear implant users: the effect of age at implantation. Ear Hear 35:148-60
McMurray, Bob; Munson, Cheyenne; Tomblin, J Bruce (2014) Individual differences in language ability are related to variation in word recognition, not speech perception: evidence from eye movements. J Speech Lang Hear Res 57:1344-62
Farris-Trimble, Ashley; McMurray, Bob; Cigrand, Nicole et al. (2014) The process of spoken word recognition in the face of signal degradation. J Exp Psychol Hum Percept Perform 40:308-27
Perreau, Ann E; Spejcher, Bryn; Ou, Hua et al. (2014) The spatial hearing questionnaire: data from individuals with normal hearing. Am J Audiol 23:173-81
Reiss, L A J; Turner, C W; Karsten, S A et al. (2014) Plasticity in human pitch perception induced by tonotopically mismatched electro-acoustic stimulation. Neuroscience 256:43-52

Showing the most recent 10 out of 138 publications