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Related Experiment Videos

Peripheral auditory lateralization assessment using TEOAEs

S Khalfa1, C Micheyl, E Veuillet

  • 1CNRS UPRESA 5020, Neurosciences et Systèmes Sensoriels, Hôpital Edouard Herriot, Lyon, France. skhalfa@neurosens.univ-lyon1.fr

Hearing Research
|July 31, 1998
PubMed
Summary
This summary is machine-generated.

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Auditory system asymmetry shows differences in TEOAE amplitudes and medial efferent system function. This study found no link between these asymmetries but confirmed the medial olivocochlear system impacts TEOAE growth slopes, suggesting peripheral auditory lateralization.

Area of Science:

  • Auditory Neuroscience
  • Otoacoustic Emissions
  • Neuroscience

Background:

  • Peripheral auditory system exhibits left-right functional asymmetry.
  • Transient Evoked Otoacoustic Emissions (TEOAEs) assess medial olivocochlear efferent system function.
  • Previous research indicates greater medial efferent system effectiveness and higher TEOAE amplitudes in the right ear.

Purpose of the Study:

  • Investigate the relationship between medial efferent system asymmetry and TEOAE amplitude asymmetry.
  • Analyze TEOAE input/output function slopes in relation to ear asymmetry.
  • Explore the impact of the medial olivocochlear system on TEOAE growth characteristics.

Main Methods:

  • Utilized contralateral acoustic suppression of TEOAEs to evaluate medial olivocochlear efferent function.

Related Experiment Videos

  • Measured TEOAE amplitudes and input/output function slopes for both ears.
  • Correlated asymmetries in TEOAE amplitude with asymmetries in medial efferent system functioning.

    • Main Results:

    • No significant relationship was found between medial efferent system asymmetry and TEOAE amplitude asymmetry.
    • The medial olivocochlear system was confirmed to increase TEOAE input/output function slopes.
    • T EOA E input/output function slopes were lower in the right ear compared to the left, indicating peripheral asymmetry.

    Conclusions:

    • Peripheral auditory asymmetry is reinforced by differences in TEOAE growth slopes.
    • The right ear may exhibit earlier saturation or reduced TEOAE response augmentation.
    • Findings support the concept of peripheral auditory lateralization in humans.