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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...

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Related Experiment Video

Updated: May 15, 2026

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

Development of response selectivity in the mouse auditory cortex.

María Magdalena Carrasco1, Michael Trujillo, Khaleel Razak

  • 1Graduate Neuroscience Program and Psychology Department, University of California, 900 University Avenue, Riverside, CA 92521, USA.

Hearing Research
|December 25, 2012
PubMed
Summary
This summary is machine-generated.

Auditory cortex development in mice shows significant changes in frequency tuning and frequency modulated sweep selectivity, with adult-like function not achieved until postnatal day 30. Neuronal responses to faster sweep rates improve during this period.

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Related Experiment Videos

Last Updated: May 15, 2026

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

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Published on: February 19, 2014

Morphological and Functional Evaluation of Ribbon Synapses at Specific Frequency Regions of the Mouse Cochlea
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Area of Science:

  • Neuroscience
  • Developmental Biology
  • Auditory System Research

Background:

  • The mouse auditory system exhibits neuronal selectivity for tone duration and frequency modulated (FM) sweep rates.
  • Developmental regulation of this selectivity in the auditory cortex remains largely uncharacterized.

Purpose of the Study:

  • To investigate the developmental trajectory of neuronal responses to tones and FM sweeps in the mouse auditory cortex.
  • To determine when the auditory cortex achieves adult-like selectivity for auditory features.

Main Methods:

  • Electrophysiological recordings were performed on ketamine/xylazine anesthetized C57bl/6 mice at three developmental stages: postnatal days 15-20, 21-30, and 31-90.
  • Neuronal responses to tones (frequency and duration tuning) and FM sweeps (direction and rate selectivity) were analyzed.

Main Results:

  • Frequency tuning bandwidth decreased with age, indicating receptive field refinement.
  • FM sweep rate and direction selectivity were developmentally regulated, with a shift towards faster sweep rates and increased fast-pass selectivity.
  • While duration tuning remained stable, FM sweep processing matured significantly, with adult-like function emerging around postnatal day 30.

Conclusions:

  • The mouse auditory cortex undergoes significant developmental changes in frequency and FM sweep processing, with maturation extending to at least postnatal day 30.
  • Improved discrimination and detection of faster FM sweep rates correlate with developmental changes in neuronal properties.
  • These findings provide insights into the maturation of auditory processing in mammals.