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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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Hearing01:31

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When we hear a sound, our nervous system is detecting sound waves—pressure waves of mechanical energy traveling through a medium. The frequency of the wave is perceived as pitch, while the amplitude is perceived as loudness.
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Perceiving Loudness, Pitch, and Location01:21

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The human brain perceives pitch through two primary mechanisms reflected in place theory and frequency theory. Each mechanism describes how sound waves are interpreted as specific pitches by the brain, offering insights into the intricate processes of auditory perception.
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Auditory Pathway01:15

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Auditory pathways constitute the complex neural circuits responsible for transmitting and interpreting auditory information from the peripheral auditory system to the brain. Sound waves are initially captured by the outer ear, funneled through the ear canal, and reach the tympanic membrane (eardrum). These vibrations are transmitted via the middle ear's ossicles to the inner ear's cochlea.
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Comparison of Quality of Life Between Patients with Chronic Unilateral Vestibular Hypofunction and Bilateral Vestibulopathy.

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European archives of oto-rhino-laryngology : official journal of the European Federation of Oto-Rhino-Laryngological Societies (EUFOS) : affiliated with the German Society for Oto-Rhino-Laryngology - Head and Neck Surgery·2026
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Related Experiment Video

Updated: Jun 4, 2025

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

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Auditory brainstem response thresholds and functional hearing: implications for cochlear implant candidacy.

Laura Jacxsens1,2,3, Emilie Cardon1,2, Hanne Blancke1,2

  • 1Department of Otorhinolaryngology, Head and Neck Surgery, Antwerp University Hospital (UZA), Edegem, Belgium.

International Journal of Audiology
|December 23, 2024
PubMed
Summary

Auditory brainstem response (ABR) thresholds correlate with hearing function in some sensorineural hearing loss (SNHL) patients. However, ABR thresholds are not reliable for evaluating cochlear implantation (CI) candidacy in severe SNHL cases.

Keywords:
Auditory Brainstem Response (ABR)CI candidacycorrelation analysissensorineural hearing lossspeech perception

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Area of Science:

  • Audiology
  • Neuroscience
  • Otolaryngology

Background:

  • Sensorineural hearing loss (SNHL) significantly impacts speech perception and quality of life.
  • Cochlear implantation (CI) is a viable treatment for severe to profound SNHL.
  • Accurate assessment of functional hearing is crucial for determining CI candidacy.

Purpose of the Study:

  • To evaluate the clinical relevance of auditory brainstem response (ABR) thresholds in assessing functional hearing.
  • To determine the correlation between ABR thresholds and speech perception scores in adults with SNHL.
  • To assess the utility of ABR thresholds in predicting cochlear implantation (CI) candidacy.

Main Methods:

  • A retrospective analysis of 191 adult patients with SNHL.
  • Correlation analysis between ABR thresholds, pure-tone audiometry, and speech perception scores in quiet.
  • Comparison of correlations across different degrees of SNHL and potential CI candidates.

Main Results:

  • A significant negative correlation was found between ABR thresholds and unaided speech perception scores (R = -0.397, P < 0.0001).
  • This correlation was significant for patients with better speech perception (≥50%) but not for those with poorer scores (<50%).
  • A moderate correlation was observed for ABR thresholds better than 60 dB nHL, but not for thresholds of 60 dB nHL or worse.

Conclusions:

  • Auditory brainstem response (ABR) thresholds show limited clinical validity for assessing functional auditory performance in severe SNHL.
  • ABR thresholds do not reliably correlate with speech perception in patients with severe hearing loss (speech perception <50% or ABR thresholds ≥60 dB nHL).
  • The findings suggest that ABR thresholds alone may be insufficient for evaluating cochlear implantation candidacy in individuals with severe SNHL.