Auditory distraction transmitted by a cochlear implant alters allocation of attentional resources

Finke, Mareike; Sandmann, Pascale; Kopp, Bruno; Lenarz, Thomas; Büchner, Andreas

doi:10.3389/fnins.2015.00068

Cited by 18 publications

(36 citation statements)

References 63 publications

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“…This conclusion is confirmed by the positive correlation between the N2/N4 latency and the ratings of the listening effort. In summary, the N2/N4 results support the view that the limited quality of the CI input leads to prolonged neural processing of speech, more effortful listening, and higher susceptibility to noisy background conditions (Finke et al, 2015;Hochmair-Desoyer et al, 1997;Rönnberg et al, 2013;Zeng et al, 2011).…”

Section: Lexical and Semantic Speech Processingsupporting

confidence: 58%

“…It is likely that the slow-down of the N2/N4 latency is related to the limited CI input which only partially matches to the attributes stored in the long-term memory (lexical representation), requiring additional explicit processing of the (limited) information transmitted by the CI (Finke et al, 2015;Rönnberg et al, 2013). One may speculate that in noisy background conditions the N2/N4 latency is further prolonged, given that the mismatch between the CI input and the cortical representation would be enhanced in difficult listening conditions.…”

Section: Lexical and Semantic Speech Processingmentioning

confidence: 99%

“…In general, there is a high variability in speech recognition ability across CI users which is likely caused by factors related to the implant, the auditory nerve, and the reorganization of the central auditory system (Drennan and Rubinstein, 2008;Nadol et al, 1989;Sandmann et al, 2012Sandmann et al, , 3 2015. In particular, electrical hearing may require additional explicit processing due to a mismatch between the attributes of the current CI input and the attributes stored in the longterm memory (Finke et al, 2015;Rönnberg et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

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On the relationship between auditory cognition and speech intelligibility in cochlear implant users: An ERP study

et al. 2016

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There is a high degree of variability in speech intelligibility outcomes across cochlear-implant (CI) users. To better understand how auditory cognition affects speech intelligibility with the CI, we performed an electroencephalography study in which we examined the relationship between central auditory processing, cognitive abilities, and speech intelligibility. Postlingually deafened CI users (N=13) and matched normal-hearing (NH) listeners (N=13) performed an oddball task with words presented in different background conditions (quiet, stationary noise, modulated noise). Participants had to categorize words as living (targets) or non-living entities (standards). We also assessed participants' working memory (WM) capacity and verbal abilities. For the oddball task, we found lower hit rates and prolonged response times in CI users when compared with NH listeners. Noise-related prolongation of the N1 amplitude was found for all participants. Further, we observed group-specific modulation effects of event-related potentials (ERPs) as a function of background noise. While NH listeners showed stronger noise-related modulation of the N1 latency, CI users revealed enhanced modulation effects of the N2/N4 latency. In general, higher-order processing (N2/N4, P3) was prolonged in CI users in all background conditions when compared with NH listeners. Longer N2/N4 latency in CI users suggests that these individuals have difficulties to map acoustic-phonetic features to lexical representations. These difficulties seem to be increased for speech-in-noise conditions when compared with speech in quiet background. Correlation analyses showed that shorter ERP latencies were related to enhanced speech intelligibility (N1, N2/N4), better lexical fluency (N1), and lower ratings of listening effort (N2/N4) in CI users. In sum, our findings suggest that CI users and NH listeners differ with regards to both the sensory and the higher-order processing of speech in quiet as well as in noisy background conditions. Our results also revealed that verbal abilities are related to speech processing and speech intelligibility in CI users, confirming the view that auditory cognition plays an important role for CI outcome. We conclude that differences in auditory-cognitive processing contribute to the variability in speech performance outcomes observed in CI users. This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting galley proof before it is published in its final citable form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. Hannover, Finke.Mareike@mh-hannover.de AbstractThere is a high degree of variability in speech intelligibility outcomes across cochlear-implant (CI) users. To better understand how auditory cognition aff...

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Section: Lexical and Semantic Speech Processingsupporting

confidence: 58%

Section: Lexical and Semantic Speech Processingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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On the relationship between auditory cognition and speech intelligibility in cochlear implant users: An ERP study

et al. 2016

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“…Recent studies have suggested that the CI outcome is related to higher-order resources such as verbal abilities or working memory (WM) capacity [Finke et al, 2015[Finke et al, , 2016Kral et al, 2016;Rönnberg et al, 2013]. According to the Ease of Language Understanding model by Rönn-berg et al [2013], WM capacity is needed to support speech understanding via an explicit processing loop in adverse listening conditions, such as listening via a CI.…”

Section: Introductionmentioning

confidence: 99%

“…Similar to previous studies, the neuronal processes underlying speech perception were examined in CI users with an oddball paradigm [Beynon et al, 2005;Finke et al, 2015Finke et al, , 2016Groenen et al, 2009;Henkin et al, 2009]. In a series of standard syllables or words, infrequent deviant stimuli were intermixed, and participants were asked to respond to these infrequent targets [Polich, 2007].…”

Section: Introductionmentioning

confidence: 99%

Consequences of Stimulus Type on Higher-Order Processing in Single-Sided Deaf Cochlear Implant Users

et al. 2016

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Single-sided deaf subjects with a cochlear implant (CI) provide the unique opportunity to compare central auditory processing of the electrical input (CI ear) and the acoustic input (normal-hearing, NH, ear) within the same individual. In these individuals, sensory processing differs between their two ears, while cognitive abilities are the same irrespectively of the sensory input. To better understand perceptual-cognitive factors modulating speech intelligibility with a CI, this electroencephalography study examined the central-auditory processing of words, the cognitive abilities, and the speech intelligibility in 10 postlingually single-sided deaf CI users. We found lower hit rates and prolonged response times for word classification during an oddball task for the CI ear when compared with the NH ear. Also, event-related potentials reflecting sensory (N1) and higher-order processing (N2/N4) were prolonged for word classification (targets versus nontargets) with the CI ear compared with the NH ear. Our results suggest that speech processing via the CI ear and the NH ear differs both at sensory (N1) and cognitive (N2/N4) processing stages, thereby affecting the behavioral performance for speech discrimination. These results provide objective evidence for cognition to be a key factor for speech perception under adverse listening conditions, such as the degraded speech signal provided from the CI.

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Side-of-Implantation Effect on Functional Asymmetry in the Auditory Cortex of Single-Sided Deaf Cochlear-Implant Users

et al. 2022

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Cochlear implants (CIs) allow to restore the hearing function in profoundly deaf individuals. Due to the degradation of the stimulus by CI signal processing, implanted individuals with single-sided deafness (SSD) have the specific challenge that the input highly differs between their ears. The present study compared normal-hearing (NH) listeners (N = 10) and left- and right-ear implanted SSD CI users (N = 10 left, N = 9 right), to evaluate cortical speech processing between CI- and NH-ears and to explore for side-of-implantation effects. The participants performed a two-deviant oddball task, separately with the left and the right ear. Auditory event-related potentials (ERPs) in response to syllables were compared between proficient and non-proficient CI users, as well as between CI and NH ears. The effect of the side of implantation was analysed on the sensor and the source level. CI proficiency could be distinguished based on the ERP amplitudes of the N1 and the P3b. Moreover, syllable processing via the CI ear, when compared to the NH ear, resulted in attenuated and delayed ERPs. In addition, the left-ear implanted SSD CI users revealed an enhanced functional asymmetry in the auditory cortex than right-ear implanted SSD CI users, regardless of whether the syllables were perceived via the CI or the NH ear. Our findings reveal that speech-discrimination proficiency in SSD CI users can be assessed by N1 and P3b ERPs. The results contribute to a better understanding of the rehabilitation success in SSD CI users by showing that cortical speech processing in SSD CI users is affected by CI-related stimulus degradation and experience-related functional changes in the auditory cortex.

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Auditory distraction transmitted by a cochlear implant alters allocation of attentional resources

Cited by 18 publications

References 63 publications

On the relationship between auditory cognition and speech intelligibility in cochlear implant users: An ERP study

On the relationship between auditory cognition and speech intelligibility in cochlear implant users: An ERP study

Consequences of Stimulus Type on Higher-Order Processing in Single-Sided Deaf Cochlear Implant Users

Side-of-Implantation Effect on Functional Asymmetry in the Auditory Cortex of Single-Sided Deaf Cochlear-Implant Users

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