Ortmann, Magdalene, Zwitserlood, Pienie, Knief, Arne, Baare, Johanna, Brinkheetker, Stephanie, Zehnhoff-Dinnesen, Antoinette Am and Dobel, Christian (2017). When Hearing Is Tricky: Speech Processing Strategies in Prelingually Deafened Children and Adolescents with Cochlear Implants Having Good and Poor Speech Performance. PLoS One, 12 (1). SAN FRANCISCO: PUBLIC LIBRARY SCIENCE. ISSN 1932-6203

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Abstract

Cochlear implants provide individuals who are deaf with access to speech. Although substantial advancements have been made by novel technologies, there still is high variability in language development during childhood, depending on adaptation and neural plasticity. These factors have often been investigated in the auditory domain, with the mismatch negativity as an index for sensory and phonological processing. Several studies have demonstrated that the MMN is an electrophysiological correlate for hearing improvement with cochlear implants. In this study, two groups of cochlear implant users, both with very good basic hearing abilities but with non-overlapping speech performance (very good or very poor speech performance), were matched according to device experience and age at implantation. We tested the perception of phonemes in the context of specific other phonemes from which they were very hard to discriminate (e.g., the vowels in /bu/ vs. /bo/). The most difficult pair was individually determined for each participant. Using behavioral measures, both cochlear implants groups performed worse than matched controls, and the good performers performed better than the poor performers. Cochlear implant groups and controls did not differ during time intervals typically used for the mismatch negativity, but earlier: source analyses revealed increased activity in the region of the right supramarginal gyrus (220-260 ms) in good performers. Poor performers showed increased activity in the left occipital cortex (220-290 ms), which may be an index for cross-modal perception. The time course and the neural generators differ from data from our earlier studies, in which the same phonemes were assessed in an easy-to-discriminate context. The results demonstrate that the groups used different language processing strategies, depending on the success of language development and the particular language context. Overall, our data emphasize the role of neural plasticity and use of adaptive strategies for successful language development with cochlear implants.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Ortmann, MagdaleneUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Zwitserlood, PienieUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Knief, ArneUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Baare, JohannaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Brinkheetker, StephanieUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Zehnhoff-Dinnesen, Antoinette AmUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Dobel, ChristianUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-242740
DOI: 10.1371/journal.pone.0168655
Journal or Publication Title: PLoS One
Volume: 12
Number: 1
Date: 2017
Publisher: PUBLIC LIBRARY SCIENCE
Place of Publication: SAN FRANCISCO
ISSN: 1932-6203
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
MISMATCH NEGATIVITY MMN; INDUCED MOVEMENT THERAPY; PHONOLOGICAL AWARENESS; EVOKED-POTENTIALS; PERCEPTION; CORTEX; BRAIN; ACTIVATION; LANGUAGE; INFANTSMultiple languages
Multidisciplinary SciencesMultiple languages
Refereed: Yes
URI: http://kups.ub.uni-koeln.de/id/eprint/24274

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