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Related Concept Videos

Auditory Pathway01:15

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...
The Cochlea01:13

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.
Hearing01:31

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.
Anatomy of the Ear01:16

Anatomy of the Ear

Auditory sensation, commonly called hearing, involves the transformation of sonic waves into neural impulses facilitated by the structures of the auditory organ. The prominent, flesh-like structure on the side of the head, called the auricle, directs sound waves towards the auditory canal. The auricle is often mislabeled as the pinna, a term more aligned with mobile structures like a feline's external ear. The auditory canal penetrates the cranium via the external auditory meatus of the...
Auditory Perception01:17

Auditory Perception

The auditory system is essential for sound perception, utilizing various critical structures. When sound waves enter the outer ear, they travel through the ear canal and cause the eardrum to vibrate. These vibrations are then transmitted to the middle ear, where three tiny bones – the malleus, incus, and stapes – amplify the sound. This amplification is crucial, as it ensures that the sound vibrations are strong enough to be conveyed to the inner ear. These vibrations then reach the cochlea, a...
Hair Cells01:22

Hair Cells

Hair cells are the sensory receptors of the auditory system—they transduce mechanical sound waves into electrical energy that the nervous system can understand. Hair cells are located in the organ of Corti within the cochlea of the inner ear, between the basilar and tectorial membranes. The actual sensory receptors are called inner hair cells. The outer hair cells serve other functions, such as sound amplification in the cochlea, and are not discussed in detail here.

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Articles linked to this work by shared authors, journal, and citation graph.

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Circuits that innervate excitatory-inhibitory cells in the inferior colliculus obtained with in vivo whole cell recordings.

The Journal of neuroscience : the official journal of the Society for Neuroscience·2013
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The dominant role of inhibition in creating response selectivities for communication calls in the brainstem auditory system.

Hearing research·2013
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Inhibition shapes response selectivity in the inferior colliculus by gain modulation.

Frontiers in neural circuits·2012
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Selectivity for spectral motion as a neural computation for encoding natural communication signals in bat inferior colliculus.

The Journal of neuroscience : the official journal of the Society for Neuroscience·2011
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It's about time: how input timing is used and not used to create emergent properties in the auditory system.

The Journal of neuroscience : the official journal of the Society for Neuroscience·2011
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Discriminating among complex signals: the roles of inhibition for creating response selectivities.

Journal of comparative physiology. A, Neuroethology, sensory, neural, and behavioral physiology·2010

Related Experiment Video

Updated: May 24, 2026

Long-range Channelrhodopsin-assisted Circuit Mapping of Inferior Colliculus Neurons with Blue and Red-shifted Channelrhodopsins
07:04

Long-range Channelrhodopsin-assisted Circuit Mapping of Inferior Colliculus Neurons with Blue and Red-shifted Channelrhodopsins

Published on: February 7, 2020

Circuits for processing dynamic interaural intensity disparities in the inferior colliculus.

George D Pollak1

  • 1Section of Neurobiology, 337 Patterson Laboratory Building, The University of Texas at Austin, Austin, TX 78712, USA. gpollak@mail.utexas.edu

Hearing Research
|February 21, 2012
PubMed
Summary

Excitatory-inhibitory (EI) neurons in the brainstem process sound localization cues. Diverse inputs create varied EI cell responses, enabling animals to track moving sounds and focus in noisy environments.

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Behavioral Determination of Stimulus Pair Discrimination of Auditory Acoustic and Electrical Stimuli Using a Classical Conditioning and Heart-rate Approach

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Last Updated: May 24, 2026

Long-range Channelrhodopsin-assisted Circuit Mapping of Inferior Colliculus Neurons with Blue and Red-shifted Channelrhodopsins
07:04

Long-range Channelrhodopsin-assisted Circuit Mapping of Inferior Colliculus Neurons with Blue and Red-shifted Channelrhodopsins

Published on: February 7, 2020

Optogenetic Stimulation of the Auditory Nerve
10:53

Optogenetic Stimulation of the Auditory Nerve

Published on: October 8, 2014

Behavioral Determination of Stimulus Pair Discrimination of Auditory Acoustic and Electrical Stimuli Using a Classical Conditioning and Heart-rate Approach
10:50

Behavioral Determination of Stimulus Pair Discrimination of Auditory Acoustic and Electrical Stimuli Using a Classical Conditioning and Heart-rate Approach

Published on: June 6, 2012

Area of Science:

  • Neuroscience
  • Auditory System
  • Computational Neuroscience

Background:

  • Interaural intensity disparities (IIDs) are crucial for high-frequency sound localization.
  • Excitatory-inhibitory (EI) neurons in the lateral superior olive (LSO), dorsal nucleus of the lateral lemniscus (DNLL), and inferior colliculus (IC) process these cues.
  • The IC is a key auditory nucleus with diverse inputs, making its EI cells of particular interest for studying binaural processing.

Purpose of the Study:

  • To review the circuits forming EI cells in the LSO, DNLL, and IC.
  • To investigate how EI neurons in the IC respond to dynamic IIDs (changing over time).
  • To explore the connectional basis for dynamic IID responsiveness in IC EI neurons.

Main Methods:

  • Review of existing literature on EI neuron circuits in auditory nuclei.
  • Analysis of EI neuron responses to static and dynamic IIDs in the IC.
  • In vivo whole-cell recordings in the IC to examine neural connections.

Main Results:

  • EI cells in the LSO, DNLL, and IC are formed by specific excitatory and inhibitory input patterns.
  • Many IC EI neurons exhibit responses to dynamic IIDs that differ from their responses to static IIDs.
  • The diversity of EI cell inputs in the IC underlies their varied responses to dynamic IIDs.

Conclusions:

  • EI cells in the IC form a diverse population shaped by their unique input connectivity.
  • This diversity enables IC EI neurons to encode not only sound source location but also sound motion and sound segregation in complex auditory scenes.
  • The neural construction of EI neurons in the IC is critical for sophisticated auditory perception in natural environments.