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Related Concept Videos

The Cochlea01:13

The Cochlea

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The cochlea is a coiled structure in the inner ear that contains hair cells—the sensory receptors of the auditory system. Sound waves are transmitted to the cochlea by small bones attached to the eardrum called the ossicles, which vibrate the oval window that leads to the inner ear. This causes fluid in the chambers of the cochlea to move, vibrating the basilar membrane.
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Related Experiment Video

Updated: Aug 12, 2025

Systematic Hearing Performance Evaluation Process for Adolescents with Cochlear Implantation at Early Ages
06:04

Systematic Hearing Performance Evaluation Process for Adolescents with Cochlear Implantation at Early Ages

Published on: March 24, 2023

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Selective attention decoding in bimodal cochlear implant users.

Hanna Dolhopiatenko1, Waldo Nogueira1

  • 1Department of Otolaryngology, Hannover Medical School and Cluster of Excellence Hearing4all, Hanover, Germany.

Frontiers in Neuroscience
|January 30, 2023
PubMed
Summary
This summary is machine-generated.

Researchers developed a new electroencephalography (EEG) method to decode selective attention in bimodal cochlear implant (CI) users, even with electrical artifact. This technique shows promise for measuring speech integration between electric and acoustic hearing.

Keywords:
bimodal hearingbimodal stimulationcentral integrationcochlear implantelectric acoustic stimulationelectroencephalographyelectrophysiological measuresselective attention

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Area of Science:

  • Neuroscience
  • Audiology
  • Biomedical Engineering

Background:

  • Cochlear implant (CI) users with residual hearing in the contralateral ear (bimodal users) benefit from combined electric and acoustic stimulation (CI+AS) for speech perception.
  • Significant variability exists in CI+AS benefit, potentially due to differences in speech integration between electric and acoustic modalities.
  • Current methods for assessing speech integration are limited, lacking physiological insights and relying on simplified stimuli.

Purpose of the Study:

  • To investigate a novel electrophysiological measure for assessing speech integration between electric and acoustic stimulation in bimodal CI users.
  • To validate a selective attention decoding paradigm using electroencephalography (EEG) in the presence of CI electrical artifacts.
  • To explore the relationship between selective attention decoding and speech integration in bimodal CI users.

Main Methods:

  • Developed and validated a selective attention decoding paradigm using EEG in bimodal CI users.
  • Recorded behavioral speech understanding tests (word repetition in competing noise) under three listening conditions: CI only (CIS), acoustic side only (AS), and bimodal (CI+AS).
  • Acquired electrophysiological data, including cortical auditory evoked potentials (CAEPs) and EEG-based selective attention decoding (transfer function response - TRF).

Main Results:

  • Selective attention was successfully decoded in bimodal CI users despite continuous electrical artifact from the CI.
  • No significant difference in behavioral speech understanding was found between CI+AS and AS only conditions, likely due to a ceiling effect.
  • An amplitude reduction in the forward transfer function (TRF) of selective attention decoding was observed in the CI+AS condition compared to AS only.

Conclusions:

  • The study demonstrates the feasibility of decoding selective attention using EEG in bimodal CI users, even with electrical artifact.
  • The observed amplitude reduction in TRF suggests altered speech integration mechanisms when combining electric and acoustic stimulation.
  • Further research is needed to establish selective attention decoding as a reliable electrophysiological measure for electric-acoustic speech integration.