Long‐Term Performance of Cochlear Implants in Postlingually Deafened Adults

Lenarz, Minoo; Sönmez, Hasibe; Joseph, G.; Büchner, Andreas; Lenarz, Thomas

doi:10.1177/0194599812438041

Cited by 116 publications

(112 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The large range of CI outcomes that we observed, as well as the mean performance, is consistent with previous reports from large-scale, international studies (13)(14)(15), indicating that the CI outcomes observed in the present study may be considered representative of the wider CI population.…”

Section: Resultssupporting

confidence: 92%

Adaptive benefit of cross-modal plasticity following cochlear implantation in deaf adults

Anderson

Wiggins

Kitterick

et al. 2017

Proc. Natl. Acad. Sci. U.S.A.

118

134

View full text Add to dashboard Cite

It has been suggested that visual language is maladaptive for hearing restoration with a cochlear implant (CI) due to cross-modal recruitment of auditory brain regions. Rehabilitative guidelines therefore discourage the use of visual language. However, neuroscientific understanding of cross-modal plasticity following cochlear implantation has been restricted due to incompatibility between established neuroimaging techniques and the surgically implanted electronic and magnetic components of the CI. As a solution to this problem, here we used functional near-infrared spectroscopy (fNIRS), a noninvasive optical neuroimaging method that is fully compatible with a CI and safe for repeated testing. The aim of this study was to examine cross-modal activation of auditory brain regions by visual speech from before to after implantation and its relation to CI success. Using fNIRS, we examined activation of superior temporal cortex to visual speech in the same profoundly deaf adults both before and 6 mo after implantation. Patients' ability to understand auditory speech with their CI was also measured following 6 mo of CI use. Contrary to existing theory, the results demonstrate that increased cross-modal activation of auditory brain regions by visual speech from before to after implantation is associated with better speech understanding with a CI. Furthermore, activation of auditory cortex by visual and auditory speech developed in synchrony after implantation. Together these findings suggest that cross-modal plasticity by visual speech does not exert previously assumed maladaptive effects on CI success, but instead provides adaptive benefits to the restoration of hearing after implantation through an audiovisual mechanism. cochlear implantation | cross-modal plasticity | functional near-infrared spectroscopy | superior temporal cortex | visual speech

show abstract

Section: Resultssupporting

confidence: 92%

Adaptive benefit of cross-modal plasticity following cochlear implantation in deaf adults

Anderson

Wiggins

Kitterick

et al. 2017

Proc. Natl. Acad. Sci. U.S.A.

118

134

View full text Add to dashboard Cite

show abstract

“…In some of the studies on CI recipients, ceiling was considered the highest score on a test, that is 100% (Gifford et al, 2008, Lenarz et al, 2012, whilst others used a cut-off of 95% (Helms et al, 2004).…”

Section: Ceiling Definitionmentioning

confidence: 99%

“…This, in turn, has resulted in improved speech perception skills of the recipients (Fabry et al, 2009, Gifford et al, 2008, Lenarz et al, 2012, Ruffin et al, 2007, Gifford et al, 2010. In clinical settings, speech perception outcomes are used to identify the potential candidates for CI surgery and also to evaluate the progress of the CI recipient post implantation (Gifford et al, 2008, Alkaf and Firszt, 2007, Gifford et al, 2010, Dowell et al, 2004, Blamey et al, 1992.…”

Section: Introductionmentioning

confidence: 99%

“…Today's post-lingually deafened adult implant recipients, however, demonstrate high levels of speech perception scores-inquiet with current sentence tests such as Hearing in Noise (HINT) sentence test in the first few months post implantation (Gifford et al, 2008, Gifford et al, 2010, Fabry et al, 2009, Lenarz et al, 2012, Helms et al, 2004. Gifford et al (2008) reported that 71% of cochlear-implanted adults scored above 85% on a common test of sentence perception in quiet, of whom 28% reached the maximum possible score.…”

Section: Introductionmentioning

confidence: 99%

“…Secondly, when a recipient receives the highest possible score during the earlier assessments, identifying the further changes in their performance over time will become a problem. A recipient's performance may continue to improve; however, the test is not sensitive enough to capture the subsequent improvements (Amoodi et al, 2012, Dowell et al, 2004, Lenarz et al, 2012, Gifford et al, 2008.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Speech perception scores in cochlear implant recipients: An analysis of ceiling effects in the CUNY sentence test (Quiet) in post-lingually deafened cochlear implant recipients

Ebrahimi-Madiseh

Eikelboom

Jayakody

et al. 2016

Cochlear Implants International

View full text Add to dashboard Cite

Objectives: To evaluate the clinical utility of the CUNY sentence test in a cohort of post-lingually deafened CI recipients over time. The distribution of all post-operative CUNY test scores skewed to the right with 82% of test scores reaching above 90%.Discussion: This study demonstrates that the CUNY test cannot be used as a valid tool to measure the speech perception skills of post-lingually deafened CI recipients over time. This may be overcome by using adaptive test protocols or linguistically, cognitively or contextually demanding test materials. Conclusion:The high percentage of CI recipients achieving ceiling scores for the CUNY sentence test in quiet at three months post-implantation, questions the validity of using CUNY in CI assessment test battery and limits its application for use in longitudinal studies evaluating CI outcomes. Further studies are required to examine different methods to overcome this problem.

show abstract