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Related Experiment Video

Updated: Jun 18, 2026

Infant Auditory Processing and Event-related Brain Oscillations
06:34

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Published on: July 1, 2015

Developmental correlation of diffusion anisotropy with auditory-evoked response.

Timothy P L Roberts1, Sarah Y Khan, Lisa Blaskey

  • 1Lurie Family Foundations MEG Imaging Center, Department of Radiology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania 19104, USA. robertstim@email.chop.edu

Neuroreport
|November 10, 2009
PubMed
Summary

Brain white matter development in children and adolescents shows increased diffusion anisotropy, correlating with faster auditory brain responses. This suggests improved myelination enhances neural signal speed.

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Area of Science:

  • Neuroscience
  • Developmental Neuroscience
  • Auditory Neuroscience

Background:

  • The development of the auditory pathway involves structural and functional maturation.
  • White matter integrity, particularly myelination, is crucial for efficient neural signal transmission.
  • Understanding the relationship between white matter development and auditory processing is key to diagnosing developmental disorders.

Purpose of the Study:

  • To investigate the relationship between white matter diffusion anisotropy and auditory evoked response latency in children and adolescents.
  • To characterize developmental changes in the auditory pathway's white matter structure and electrophysiological function.

Main Methods:

  • Diffusion tensor imaging (DTI) was used to measure white matter diffusion anisotropy in the acoustic radiations.
  • Auditory-evoked neuromagnetic fields were recorded to assess the latency of auditory responses in the superior temporal gyrus.
  • Correlation analyses were performed to examine the relationship between diffusion anisotropy, age, and response latency.

Main Results:

  • White matter diffusion anisotropy in the acoustic radiations increased with age in children and adolescents.
  • Auditory-evoked response latency in the superior temporal gyrus decreased with age.
  • A significant negative correlation was found between white matter diffusion anisotropy and auditory response latency.

Conclusions:

  • Increased white matter diffusion anisotropy reflects developmental maturation of auditory pathway white matter, likely due to myelination.
  • Faster auditory response timing in the superior temporal gyrus is associated with enhanced white matter structural integrity.
  • These findings support a biophysical model where myelination influences conduction velocity and cortical response timing during development.