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Auditory Pathway

Auditory Pathway

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.
When viewed cross-sectionally, the cochlea reveals the scala vestibuli and scala tympani flanking...

The Cochlea

The Cochlea

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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Related Experiment Video

Updated: Jan 10, 2026

Data Acquisition and Analysis In Brainstem Evoked Response Audiometry In Mice

Data Acquisition and Analysis In Brainstem Evoked Response Audiometry In Mice

Published on: May 10, 2019

Bone conducted responses using the parallel auditory brainstem response (pABR) paradigm.

Melissa J Polonenko¹, Ross K Maddox²

¹Department of Speech-Language-Hearing Sciences, University of Minnesota.

Biorxiv : the Preprint Server for Biology

|November 24, 2025

Summary

This summary is machine-generated.

This study shows that bone conduction parallel auditory brainstem responses (pABR) are feasible for diagnosing hearing loss. Similar waveforms were observed between air and bone conduction, advancing hearing diagnostic capabilities.

Keywords:

Air conduction Assessment Auditory brainstem response (ABR)Bone conduction Electroencephalography Normal hearing

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Area of Science:

Audiology
Neuroscience
Biomedical Engineering

Background:

Auditory brainstem responses (ABRs) are crucial for diagnosing hearing loss in non-behavioral participants.
The parallel ABR (pABR) paradigm efficiently measures responses across frequencies and both ears simultaneously.
Bone conduction stimuli are essential for differentiating hearing loss types but haven't been integrated with pABR.

Purpose of the Study:

To confirm the feasibility of using bone conduction with the parallel ABR (pABR) paradigm.
To evaluate the effectiveness of pABR with bone-conducted stimuli for comprehensive hearing loss diagnosis.

Main Methods:

Young adults with normal hearing were recruited for the study.
Two-channel ABRs were recorded using both insert earphones (air conduction) and a bone vibrator (bone conduction).
Waveform morphology, including wave V latency and amplitude, was compared between air and bone conduction stimuli.

Main Results:

Bone conduction pABR yielded similar waveform morphologies and wave V characteristics compared to air conduction.
Mitigation strategies for stimulus artifacts were effective for bone conduction.
Bone-conducted responses at 8 kHz were weaker, consistent with physical limitations.

Conclusions:

Bone conduction pABR is feasible and provides comparable results to air conduction.
This research is a significant step toward using pABR for diagnosing all types of hearing loss.
Establishing dB nHL values for bone conduction pABR enhances its clinical applicability.