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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...

Hearing

Hearing

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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A Method for Tracking the Time Evolution of Steady-State Evoked Potentials

A Method for Tracking the Time Evolution of Steady-State Evoked Potentials

Published on: May 25, 2019

Auditory steady state response in auditory neuropathy.

A A Emara¹, T A Gabr

¹MD Audiology Unit, ENT Department, Tanta University, Cairo, Egypt. Afaf_emara@hotmail.com

The Journal of Laryngology and Otology

|April 15, 2010

Summary

Auditory neuropathy patients often have absent auditory brainstem responses. The auditory steady state response provides a more reliable objective measure for assessing hearing thresholds in these individuals.

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Area of Science:

Audiology
Neuroscience
Otolaryngology

Background:

Auditory neuropathy is a condition affecting the auditory nerve, characterized by normal outer hair cell function but abnormal auditory brainstem response.
Traditional audiological tests may not fully capture the extent of hearing impairment in auditory neuropathy.

Purpose of the Study:

To objectively evaluate hearing thresholds in patients diagnosed with auditory neuropathy.
To compare the efficacy of auditory steady state response (ASSR) with auditory brainstem response (ABR) in this patient group.

Main Methods:

A cohort of 13 patients with auditory neuropathy and 15 normal-hearing controls underwent comprehensive audiological assessments.
Evaluations included otoacoustic emissions, auditory brainstem response (ABR), and auditory steady state response (ASSR).

Main Results:

The auditory brainstem response (ABR) was absent in 11 out of 13 auditory neuropathy patients.
In contrast, the auditory steady state response (ASSR) was absent in only three of these patients, indicating a higher success rate.

Conclusions:

The auditory steady state response (ASSR) is a valuable objective tool for assessing hearing thresholds across various frequencies in auditory neuropathy.
ASSR is recommended to supplement standard audiological evaluations for a more complete assessment of auditory function in patients with auditory neuropathy.