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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...

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Updated: May 1, 2026

Functional Imaging of Auditory Cortex in Adult Cats using High-field fMRI

Functional Imaging of Auditory Cortex in Adult Cats using High-field fMRI

Published on: February 19, 2014

Animal models of auditory temporal processing.

Jos J Eggermont¹

¹Department of Physiology and Pharmacology, Department of Psychology, University of Calgary, Calgary, Alberta, Canada.

International Journal of Psychophysiology : Official Journal of the International Organization of Psychophysiology

|April 9, 2014

Summary

This summary is machine-generated.

Auditory temporal processing in humans involves bottom-up and top-down mechanisms. This review highlights how firing rate adaptation in auditory systems explains key temporal processing findings, crucial for understanding sound perception.

Keywords:

First-spike latency Forward masking Gap detection Perstimulatory adaptation Stimulus-specific adaptation Stream segregation Temporal modulation transfer function Voice-onset time

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Area of Science:

Neuroscience
Auditory Neuroscience
Computational Neuroscience

Background:

Human temporal processing involves both bottom-up and top-down mechanisms.
Animal models primarily investigate bottom-up auditory temporal processing.
A unified understanding of auditory temporal processing mechanisms is lacking.

Purpose of the Study:

To review auditory temporal processing literature and identify fundamental mechanisms.
To elucidate the role of perstimulatory firing rate adaptation in auditory temporal processing.
To connect animal model findings to human perceptual studies.

Main Methods:

Literature review of auditory temporal processing studies.
Analysis of mechanisms underlying temporal processing findings.
Comparison of adaptation and recovery time constants across auditory system levels.

Main Results:

Perstimulatory firing rate adaptation, driven by synaptic transmitter release, underlies many auditory temporal processing phenomena.
Adaptation and recovery time constants show surprising similarity between auditory periphery and cortex.
Forward masking, gap detection, and temporal modulation transfer functions are linked to perstimulatory adaptation.

Conclusions:

Perstimulatory adaptation is a fundamental mechanism in auditory temporal processing.
First-spike latency and neural synchrony are critical for sound localization, pitch perception, and perceptual binding.
Caution is needed when extrapolating findings from anesthetized animal models to human perception.