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Evaluation of the Effects of Caloric Vestibular Stimulations on Distortion Product Otoacoustic Emission Responses.

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Title: Evaluation of the Effects of Caloric Vestibular Stimulations on Distortion Product Otoacoustic Emission Responses.
Authors: Dizdar, Handan Turan1 handanturandizdar@gmail.com, Yilmaz, Oğuz2, Gündoğdu, Oğulcan3
Source: American Journal of Audiology. Jun2026, Vol. 35 Issue 2, p628-633. 6p.
Subject Terms: *Auditory perception testing, *Academic medical centers, *Data analysis, *Audiometry, *Longitudinal method, Central nervous system physiology, Vestibular apparatus physiology, Repeated measures design, Neural pathways, Electronystagmography, Otoacoustic emissions, Descriptive statistics, Multivariate analysis, Vestibular apparatus diseases, Analysis of variance, Statistics, Vestibular stimulation, Data analysis software, Vestibular function tests, Cochlea, Hair cells, Otoscopy
Geographic Terms: Türkiye
Abstract: Purpose: Although the effects of the auditory system on the balance system are known, we do not possess sufficient knowledge about the possible effects of the balance system on the auditory system. This study aims to investigate the impact of bithermal caloric stimulation on the outer hair cell functions of the contralateral ear. Method: Distortion product otoacoustic emissions (DPOAEs) were recorded before, during, and after bithermal caloric stimulation. A repeated-measures multivariate analysis examined the effects of Condition (pre, cold, warm, post) and Frequency (13 f2 frequencies). Results: DPOAE amplitudes decreased significantly during caloric-induced nystagmus. A significant effect was observed among DPOAE frequencies. The largest amplitude changes occurred in the midfrequency range, while smaller response changes were seen at both low and high frequencies. This significant frequency interaction indicates that caloric-induced suppression varies across frequencies. Furthermore, both cold and warm irrigation reduced DPOAE amplitudes with warm irrigation, in particular, generally provided greater suppression and showed that this effect was related to the rate of caloric stimulation. Posttest values showed that this reduction persisted, albeit to a lesser extent than during active irrigation. Conclusions: This study shows a significant decrease in DPOAE results for all frequencies during caloric stimulation, supporting the idea that vestibular inputs affect the auditory system through central mechanisms. These findings contribute to emerging evidence of bidirectional interactions between the vestibular and auditory systems. [ABSTRACT FROM AUTHOR]
Copyright of American Journal of Audiology is the property of American Speech-Language-Hearing Association and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Education Research Complete
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  Data: Evaluation of the Effects of Caloric Vestibular Stimulations on Distortion Product Otoacoustic Emission Responses.
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  Data: <searchLink fieldCode="AR" term="%22Dizdar%2C+Handan+Turan%22">Dizdar, Handan Turan</searchLink><relatesTo>1</relatesTo><i> handanturandizdar@gmail.com</i><br /><searchLink fieldCode="AR" term="%22Yilmaz%2C+Oğuz%22">Yilmaz, Oğuz</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Gündoğdu%2C+Oğulcan%22">Gündoğdu, Oğulcan</searchLink><relatesTo>3</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22American+Journal+of+Audiology%22">American Journal of Audiology</searchLink>. Jun2026, Vol. 35 Issue 2, p628-633. 6p.
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  Data: *<searchLink fieldCode="DE" term="%22Auditory+perception+testing%22">Auditory perception testing</searchLink><br />*<searchLink fieldCode="DE" term="%22Academic+medical+centers%22">Academic medical centers</searchLink><br />*<searchLink fieldCode="DE" term="%22Data+analysis%22">Data analysis</searchLink><br />*<searchLink fieldCode="DE" term="%22Audiometry%22">Audiometry</searchLink><br />*<searchLink fieldCode="DE" term="%22Longitudinal+method%22">Longitudinal method</searchLink><br /><searchLink fieldCode="DE" term="%22Central+nervous+system+physiology%22">Central nervous system physiology</searchLink><br /><searchLink fieldCode="DE" term="%22Vestibular+apparatus+physiology%22">Vestibular apparatus physiology</searchLink><br /><searchLink fieldCode="DE" term="%22Repeated+measures+design%22">Repeated measures design</searchLink><br /><searchLink fieldCode="DE" term="%22Neural+pathways%22">Neural pathways</searchLink><br /><searchLink fieldCode="DE" term="%22Electronystagmography%22">Electronystagmography</searchLink><br /><searchLink fieldCode="DE" term="%22Otoacoustic+emissions%22">Otoacoustic emissions</searchLink><br /><searchLink fieldCode="DE" term="%22Descriptive+statistics%22">Descriptive statistics</searchLink><br /><searchLink fieldCode="DE" term="%22Multivariate+analysis%22">Multivariate analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Vestibular+apparatus+diseases%22">Vestibular apparatus diseases</searchLink><br /><searchLink fieldCode="DE" term="%22Analysis+of+variance%22">Analysis of variance</searchLink><br /><searchLink fieldCode="DE" term="%22Statistics%22">Statistics</searchLink><br /><searchLink fieldCode="DE" term="%22Vestibular+stimulation%22">Vestibular stimulation</searchLink><br /><searchLink fieldCode="DE" term="%22Data+analysis+software%22">Data analysis software</searchLink><br /><searchLink fieldCode="DE" term="%22Vestibular+function+tests%22">Vestibular function tests</searchLink><br /><searchLink fieldCode="DE" term="%22Cochlea%22">Cochlea</searchLink><br /><searchLink fieldCode="DE" term="%22Hair+cells%22">Hair cells</searchLink><br /><searchLink fieldCode="DE" term="%22Otoscopy%22">Otoscopy</searchLink>
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  Data: <searchLink fieldCode="DE" term="%22Türkiye%22">Türkiye</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Purpose: Although the effects of the auditory system on the balance system are known, we do not possess sufficient knowledge about the possible effects of the balance system on the auditory system. This study aims to investigate the impact of bithermal caloric stimulation on the outer hair cell functions of the contralateral ear. Method: Distortion product otoacoustic emissions (DPOAEs) were recorded before, during, and after bithermal caloric stimulation. A repeated-measures multivariate analysis examined the effects of Condition (pre, cold, warm, post) and Frequency (13 f2 frequencies). Results: DPOAE amplitudes decreased significantly during caloric-induced nystagmus. A significant effect was observed among DPOAE frequencies. The largest amplitude changes occurred in the midfrequency range, while smaller response changes were seen at both low and high frequencies. This significant frequency interaction indicates that caloric-induced suppression varies across frequencies. Furthermore, both cold and warm irrigation reduced DPOAE amplitudes with warm irrigation, in particular, generally provided greater suppression and showed that this effect was related to the rate of caloric stimulation. Posttest values showed that this reduction persisted, albeit to a lesser extent than during active irrigation. Conclusions: This study shows a significant decrease in DPOAE results for all frequencies during caloric stimulation, supporting the idea that vestibular inputs affect the auditory system through central mechanisms. These findings contribute to emerging evidence of bidirectional interactions between the vestibular and auditory systems. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of American Journal of Audiology is the property of American Speech-Language-Hearing Association and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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    Identifiers:
      – Type: doi
        Value: 10.1044/2026_AJA-25-00234
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      – Code: eng
        Text: English
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        PageCount: 6
        StartPage: 628
    Subjects:
      – SubjectFull: Auditory perception testing
        Type: general
      – SubjectFull: Academic medical centers
        Type: general
      – SubjectFull: Data analysis
        Type: general
      – SubjectFull: Audiometry
        Type: general
      – SubjectFull: Longitudinal method
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      – SubjectFull: Central nervous system physiology
        Type: general
      – SubjectFull: Vestibular apparatus physiology
        Type: general
      – SubjectFull: Repeated measures design
        Type: general
      – SubjectFull: Neural pathways
        Type: general
      – SubjectFull: Electronystagmography
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      – SubjectFull: Otoacoustic emissions
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      – SubjectFull: Descriptive statistics
        Type: general
      – SubjectFull: Multivariate analysis
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      – SubjectFull: Vestibular apparatus diseases
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      – SubjectFull: Vestibular stimulation
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      – SubjectFull: Data analysis software
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      – SubjectFull: Vestibular function tests
        Type: general
      – SubjectFull: Cochlea
        Type: general
      – SubjectFull: Hair cells
        Type: general
      – SubjectFull: Otoscopy
        Type: general
      – SubjectFull: Türkiye
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    Titles:
      – TitleFull: Evaluation of the Effects of Caloric Vestibular Stimulations on Distortion Product Otoacoustic Emission Responses.
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            NameFull: Dizdar, Handan Turan
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            NameFull: Yilmaz, Oğuz
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            – D: 01
              M: 06
              Text: Jun2026
              Type: published
              Y: 2026
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