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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...
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.
Motor and Sensory Areas of the Cortex01:14

Motor and Sensory Areas of the Cortex

The cerebral cortex, the brain's outermost layer, is pivotal in processing complex cognitive tasks, emotions, and various sensory inputs and executing voluntary motor activities. This intricate structure is divided into three primary functional areas: the motor areas, sensory areas, and association areas.
Motor Areas
The motor areas located in the frontal lobe are central to controlling voluntary movements. This region is further subdivided into the primary motor cortex and the premotor cortex.
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.
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...
Diencephalon: Thalamus and Information Relay01:27

Diencephalon: Thalamus and Information Relay

The thalamus, often called “the gateway to the cerebral cortex,” is vital in processing and directing sensory and motor signals throughout the brain. Almost all inputs destined for the cerebral cortex, except for olfactory signals, are relayed through the thalamus. The thalamus is  a sophisticated relay station, channeling information from various brain regions to the cerebral cortex, as well as a filter, prioritizing certain signals over others based on current physiological states or needs.

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Related Experiment Video

Updated: Jun 16, 2026

Functional Imaging of Auditory Cortex in Adult Cats using High-field fMRI
10:50

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

Published on: February 19, 2014

Information flow in the auditory cortical network.

Troy A Hackett1

  • 1Dept. of Hearing and Speech Sciences, Vanderbilt University School of Medicine, 301 Wilson Hall, 111 21st Avenue South Nashville, TN 37203, USA. troy.a.hackett@vanderbilt.edu

Hearing Research
|February 2, 2010
PubMed
Summary
This summary is machine-generated.

The brain

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Related Experiment Videos

Last Updated: Jun 16, 2026

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Stereotactically-guided Ablation of the Rat Auditory Cortex, and Localization of the Lesion in the Brain
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Stereotactically-guided Ablation of the Rat Auditory Cortex, and Localization of the Lesion in the Brain

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Area of Science:

  • Neuroscience
  • Auditory Neuroscience

Background:

  • Auditory processing involves a complex network of interconnected areas in the cerebral cortex.
  • The temporal cortex, specifically the auditory cortex, is central to auditory activity, receiving input from the medial geniculate complex.
  • Auditory information extends beyond the auditory cortex to related areas through established neural pathways.

Purpose of the Study:

  • To provide an overview of the principal circuits involved in auditory information flow within the brain.
  • To describe neurochemical gradients along major axes of the auditory network.
  • To highlight the role of glutamate transporters in thalamocortical projections to the auditory cortex.

Main Methods:

  • Review of principal circuits in auditory processing.
  • Description of neurochemical gradients.
  • Analysis of glutamate transporters in thalamocortical projections.
  • Discussion of neurophysiological findings related to structural gradients.

Main Results:

  • Auditory information flow is characterized by orderly regional, areal, and laminar patterns.
  • Structural constraints passively govern information flow across the network.
  • Neurochemical properties dynamically regulate information exchange within auditory circuits.
  • Glutamate transporters play a role in thalamocortical projections to the auditory cortex.

Conclusions:

  • The structure and neurochemistry of the auditory network dictate information processing.
  • Understanding these gradients is crucial for comprehending auditory perception.
  • Further research into neurophysiological findings can elucidate structural gradients in the auditory system.