Using functional near infrared spectroscopy to assess auditory responses in auditory and lateral frontal cortex

Min Zhang, Antje Ihlefeld

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A growing literature reveals that brain mechanisms contribute to symptoms of hearing loss. To study how hearing loss affects brain function, several groups including our own have developed light-based methods via functional near-infrared spectroscopy (fNIRS). Using fNIRS, we recently confirmed that lateral frontal cortex (LFC) engages when normal-hearing listeners direct attention to words in background sound versus listen passively. We now test how sensory resolution affects LFC recruitment. As a control, we also record over auditory cortex (AC). Using simulated cochlear implant speech, we ask listeners to perform a word detection task in a situation with competing background speech, as a function of the amount of sensory detail in the cochlear implant simulation. One possibility is that impoverished sensory cues reduce AC or LFC engagement, as compared to high-fidelity cues, limiting the potential usefulness auditory attention. Alternatively, poorly resolved sensory detail may increase AC or LFC engagement, causing it to saturate and limiting overall speech intelligibility. Recruitment of AC and LFC will be discussed in context of the saturation hypothesis.

Original languageEnglish (US)
Title of host publicationProceedings of the 23rd International Congress on Acoustics
Subtitle of host publicationIntegrating 4th EAA Euroregio 2019
EditorsMartin Ochmann, Vorlander Michael, Janina Fels
PublisherInternational Commission for Acoustics (ICA)
Pages5659-5663
Number of pages5
ISBN (Electronic)9783939296157
DOIs
StatePublished - 2019
Event23rd International Congress on Acoustics: Integrating 4th EAA Euroregio, ICA 2019 - Aachen, Germany
Duration: Sep 9 2019Sep 23 2019

Publication series

NameProceedings of the International Congress on Acoustics
Volume2019-September
ISSN (Print)2226-7808
ISSN (Electronic)2415-1599

Conference

Conference23rd International Congress on Acoustics: Integrating 4th EAA Euroregio, ICA 2019
CountryGermany
CityAachen
Period9/9/199/23/19

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Acoustics and Ultrasonics

Keywords

  • Cochlear implant
  • Functional near infrared spectroscopy

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