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Related Experiment Videos

Multisensory Integration in Cochlear Implant Recipients.

Ryan A Stevenson1, Sterling W Sheffield, Iliza M Butera

  • 11Department of Psychology, University of Western Ontario, London, Ontario, Canada; 2Brain and Mind Institute, University of Western Ontario, London, Ontario, Canada; 3Walter Reed National Military Medical Center, Audiology and Speech Pathology Center, London, Ontario, Canada; 4Vanderbilt Brain Institute, Nashville, Tennesse; 5Vanderbilt Kennedy Center, Nashville, Tennesse; 6Department of Psychology, Vanderbilt University, Nashville, Tennesse; 7Department of Psychiatry, Vanderbilt University Medical Center, Nashville, Tennesse; and 8Department of Hearing and Speech Sciences, Vanderbilt University Medical Center, Nashville, Tennesse.

Ear and Hearing
|April 12, 2017
PubMed
Summary

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Cochlear implant (CI) users often benefit from combining auditory and visual speech cues, but this benefit varies with implantation age and task. Early implantation is crucial for optimal multisensory integration in CI users.

Area of Science:

  • Neuroscience
  • Audiology
  • Speech-language pathology

Background:

  • Speech perception relies on integrating auditory and visual information.
  • Cochlear implants (CIs) provide hearing after auditory deprivation, creating a unique context for multisensory integration.
  • Research on multisensory benefits in CI users is a growing but relatively new field.

Purpose of the Study:

  • To review existing research on multisensory integration in CI users.
  • To identify factors influencing audiovisual benefits in CI recipients.
  • To suggest future research directions for understanding CI-related multisensory processing.

Main Methods:

  • Literature review of studies on multisensory integration in CI users.
  • Analysis of factors such as age of implantation, task type, and performance levels.

Related Experiment Videos

  • Comparison of CI user performance with typically hearing individuals.

    • Main Results:

    • Many CI recipients demonstrate some perceptual gains from multisensory integration.
    • Audiovisual benefits are observed for phoneme, word, and sentence perception in both children and adults with CIs.
    • Gains are influenced by age at implantation, task demands, and individual performance, with early implantation yielding better results.
    • Suprasegmental feature perception does not show demonstrable audiovisual gains.
    • Integration patterns in CI users may differ fundamentally from those in typical hearing listeners.

    Conclusions:

    • CI users can benefit from audiovisual speech cues, but the extent varies.
    • Early implantation appears critical for maximizing audiovisual integration benefits, suggesting sensitive developmental periods.
    • Further research is needed to elucidate the mechanisms of multisensory integration in individuals with hearing loss, especially concerning low-level processing.