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Sex differences in subcortical auditory processing emerge across development.

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Summary
This summary is machine-generated.

Sex differences in human auditory processing emerge later than previously thought, originating from multiple central auditory pathways, not just the cochlea. This study reveals distinct developmental trajectories contributing to these demographic variations.

Keywords:
Auditory midbrainFrequency-following responseMaturation

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Area of Science:

  • Neuroscience
  • Auditory Neuroscience
  • Developmental Neuroscience

Background:

  • Human subcortical auditory processing exhibits sexual dimorphism.
  • The prevailing hypothesis attributes these sex differences to cochlear variations, which remains unproven.
  • The contribution of distinct auditory processes to these sex differences is not well understood.

Purpose of the Study:

  • To investigate the developmental origins of sex differences in subcortical auditory processing.
  • To determine if these differences emerge from peripheral (cochlear) or central auditory system maturation.
  • To ascertain whether sex differences in auditory processing stem from distinct developmental trajectories.

Main Methods:

  • Mapped the emergence of subcortical auditory sex differences across three age groups (3-5, 14-15, 22-26 years) in 516 participants.
  • Analyzed developmental trajectories of auditory evoked-response components.
  • Utilized predictive modeling to assess the contribution of each component to demographic prediction (sex and age).

Main Results:

  • Some subcortical sex differences manifest well after cochlear maturation.
  • Each auditory evoked-response measure uniquely contributed to predicting participant sex and age.
  • Developmental trajectories of auditory processing components show distinct patterns related to sex.

Conclusions:

  • Sex differences in human subcortical auditory processing originate from multiple central auditory pathways, not solely the cochlea.
  • The maturation of central auditory processes plays a significant role in the emergence of these sex differences.
  • Distinct developmental trajectories of auditory evoked responses underlie demographic variations in auditory processing.