25dga143
10.3205/25dga143
urn:nbn:de:0183-25dga1437
Meeting Abstract
Electrophysiological correlates of monaural and binaural speech processing in single sided deafness patients supplied with a cochlear implant compared to normal-hearing subjects
Rossi
Rossi
Sonja
S
Medizinische Universität Innsbruck, ICONE – Innsbruck Cognitive Neuroscience, Univ.-Klinik für Hör-, Stimm- und Sprachstörungen, Innsbruck, Österreich
author
Seebacher
Seebacher
Josef
J
Medizinische Universität Innsbruck, ICONE – Innsbruck Cognitive Neuroscience, Univ.-Klinik für Hör-, Stimm- und Sprachstörungen, Innsbruck, Österreich
author
Rackl
Rackl
Annika
A
Medizinische Universität Innsbruck, ICONE – Innsbruck Cognitive Neuroscience, Univ.-Klinik für Hör-, Stimm- und Sprachstörungen, Innsbruck, Österreich
author
Thurner
Thurner
Isabella
I
Medizinische Universität Innsbruck, ICONE – Innsbruck Cognitive Neuroscience, Univ.-Klinik für Hör-, Stimm- und Sprachstörungen, Innsbruck, Österreich
author
Zelger
Zelger
Philipp
P
Medizinische Universität Innsbruck, ICONE – Innsbruck Cognitive Neuroscience, Univ.-Klinik für Hör-, Stimm- und Sprachstörungen, Innsbruck, Österreich
author
Rungger
Rungger
Markus
M
Medizinische Universität Innsbruck, Univ.-Klinik für Hör-, Stimm- und Sprachstörungen, Innsbruck, Österreich
author
Zorowka
Zorowka
Patrick
P
Medizinische Universität Innsbruck, Univ.-Klinik für Hör-, Stimm- und Sprachstörungen, Innsbruck, Österreich
author
Graf
Graf
Simone
S
Medizinische Universität Innsbruck, Univ.-Klinik für Hör-, Stimm- und Sprachstörungen, Innsbruck, Österreich
author
Hahne
Hahne
Anja
A
Universitätsklinikum Carl Gustav Carus, HNO-Klinik & Sächsisches Cochlear Implant Center, Dresden, Deutschland
author
German Medical Science GMS Publishing House
Düsseldorf
610
20250318
engl
This is an Open Access article distributed under the terms of the Creative Commons Attribution 4.0 License.
Dieser Artikel ist ein Open-Access-Artikel und steht unter den Lizenzbedingungen der Creative Commons Attribution 4.0 License (Namensnennung).
M0607
143
Deutsche Gesellschaft für Audiologie e. V. und ADANO
27. Jahrestagung der Deutschen Gesellschaft für Audiologie und Arbeitstagung der Arbeitsgemeinschaft Deutschsprachiger Audiologen, Neurootologen und Otologen
Postersession
Göttingen
20250319
20250321
143
TextResearch aims: Normal-hearing people do not show any difficulties in extracting fine-grained information from the acoustic signal of each ear in order to interpret the meaning of speech and sounds. This process is undertaken primarily from the left hemisphere in the brain in right-handed people. Acoustic signals presented to the right ear are preferentially processed which is referred to as „Right-Ear-Advantage". Hearing impaired patients, especially those with a single sided deafness (SSD) have to understand speech with only one ear. This can be supported by hearing aids such as cochlear implants. With the present study we aim at investigating neural mechanisms in the brain during monaural and binaural presentation of speech in SSD patients supplied with a cochlear implant in order to gain more detailed insights into brain reorganization to strengthen speech intelligibility.Design and methods: Cochlear-implant patients with unilateral hearing impairment at the right ear and age-matched normal-hearing subjects were presented with semantically correct and incorrect sentences via inset headphones. Sentences were presented either monaurally to the left or right ear or binaurally to both ears simultaneously. Brain activity was assessed via electroencephalography (EEG) capable to identify fast dynamic changes in the range of milliseconds. This excellent temporal resolution allows to investigate the N400 component reliably reflecting semantic processes and its degree of difficulty in accessing speech meaning. Results and discussion Preliminary results show in normal-hearing subjects an increased N400 amplitude for semantically incorrect compared to correct sentences. This effect is in line with previous studies evidencing the more challenging access to the mental lexicon for incorrect sentences. This effect was present irrespective of whether sentences were presented monaurally or binaurally. Cochlear-implant patients show a similar pattern of results however predominantly for the binaural presentation. These findings emphasize the importance of supplying the hearing impaired ear with a cochlear implant in order to allow similar processing mechanisms as in normal-hearing subjects during binaural presentation. However, the brain of SSD patients seems to adopt different reorganization mechanisms during monaural hearing in order to compensate for speech intelligibility.
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