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[Diffusion tensor imaging of the central auditory system in the elderly].

L Peng1, S L Yu2, Y Jing1

  • 1Department of Otolaryngology-Head and Neck Surgery, People's Hospital of Guangxi Zhuang Autonomous Region, Nanning, 530021, China.

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Summary

Age-related changes in the central auditory system are evident in presbycusis patients. Auditory brainstem response (ABR) and diffusion tensor imaging (DTI) revealed microstructural alterations in the auditory pathway, particularly in Heschl's gyrus.

Keywords:
auditory cortexauditury brainstem responsediffusion tensor imagingpresbycusis

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Area of Science:

  • Neuroscience
  • Audiology
  • Medical Imaging

Background:

  • Presbycusis, or age-related hearing loss, affects the central auditory system.
  • Understanding these changes is crucial for developing targeted interventions.

Purpose of the Study:

  • To investigate age-related microstructural changes in the central auditory system of individuals with presbycusis.
  • To utilize auditory brainstem response (ABR) and diffusion tensor imaging (DTI) to assess these changes.

Main Methods:

  • The study included elderly subjects with presbycusis, elderly subjects with normal hearing, and young healthy controls.
  • Auditory brainstem response (ABR) and diffusion tensor imaging (DTI) were performed on all participants.
  • Fractional anisotropy (FA) was measured in the inferior colliculus (IC) and Heschl's gyrus.

Main Results:

  • Aging increased ABR peak latencies, but not the I-V interpeak latency interval.
  • Presbycusis patients showed prolonged wave V latencies compared to elderly individuals with normal hearing.
  • Fractional anisotropy (FA) values in Heschl's gyrus were significantly higher in healthy controls, followed by elderly normal hearing, and then presbycusis groups, indicating microstructural degradation with age and hearing loss.

Conclusions:

  • Age-related microstructural changes occur in the central auditory system.
  • These changes are more pronounced in individuals with presbycusis.
  • ABR and DTI are valuable tools for evaluating these auditory pathway alterations.