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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.
Neuroplasticity01:01

Neuroplasticity

Neuroplasticity reflects the brain's remarkable capacity to adapt and evolve, responding dynamically to learning, experiences, or injury by reorganizing its neural circuitry. This reorganization involves creating new neural connections and refining old ones through a series of biological processes that contribute to the brain's lifelong development and adaptability.
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...
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...

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Related Experiment Video

Updated: May 31, 2026

A Method to Study Adaptation to Left-Right Reversed Audition
07:14

A Method to Study Adaptation to Left-Right Reversed Audition

Published on: October 29, 2018

Two-dimensional adaptation in the auditory forebrain.

Tatyana O Sharpee1, Katherine I Nagel, Allison J Doupe

  • 1The Crick-Jacobs Center for Theoretical and Computational Biology, Computational Neurobiology Laboratory, The Salk Institute for Biological Studies, and the Center for Theoretical Biological Physics, University of California, San Diego, La Jolla, CA, USA. sharpee@salk.edu

Journal of Neurophysiology
|July 15, 2011
PubMed
Summary
This summary is machine-generated.

Neural adaptation in the auditory cortex dynamically adjusts to sound intensity. Neurons encode sound features using time differentials, a strategy that improves naturalistic stimulus encoding and robustness.

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

Last Updated: May 31, 2026

A Method to Study Adaptation to Left-Right Reversed Audition
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Published on: October 29, 2018

Stereotactically-guided Ablation of the Rat Auditory Cortex, and Localization of the Lesion in the Brain
09:29

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

Published on: October 11, 2017

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

Area of Science:

  • Neuroscience
  • Auditory Perception
  • Sensory Coding

Background:

  • Sensory neurons adapt to stimulus statistics, impacting neural encoding.
  • Adaptation's effect on secondary stimulus dimensions is less understood than on primary ones.
  • Field L in avian auditory cortex processes temporally modulated sounds.

Purpose of the Study:

  • Investigate how neural adaptation affects the encoding of secondary stimulus dimensions.
  • Determine the stimulus features that drive neuronal firing in response to modulated sounds.
  • Explore the adaptive strategies employed by neurons in response to changing stimulus statistics.

Main Methods:

  • Recorded single-neuron responses in avian field L to temporally modulated sounds.
  • Analyzed firing rates in relation to sound log-amplitude and its time derivatives.
  • Developed theoretical models to assess encoding strategies for naturalistic stimuli.

Main Results:

  • Neuronal firing rates depend on nonlinear combinations of sound log-amplitude and its time derivatives.
  • Relevant stimulus features shift from mean and first derivative (low amplitude) to first and second derivatives (high amplitude).
  • Increased stimulus variance enhanced the contribution of the second dimension without altering relevant dimensions, indicating adaptive behavior.

Conclusions:

  • Auditory neurons exhibit adaptive multidimensional encoding, conserving relationships between stimulus dimensions across intensity changes.
  • The use of time differentials as stimulus features is an effective strategy for encoding naturalistic sounds.
  • This adaptive encoding enhances robustness to correlated noise and potentially lowers sampling rates.