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Controlled Cortical Impact Model for Traumatic Brain Injury
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Traumatic brain injury impact on normal hearing.

Fazle Kibria1, Sudip Kumar Das2

  • 1Lovelace Biomedical Research Institute, Albuquerque, NM, 87108, USA.

Chinese Journal of Traumatology = Zhonghua Chuang Shang Za Zhi
|March 6, 2026
PubMed
Summary

Traumatic brain injury (TBI) can cause widespread health issues, including significant auditory system damage. This study highlights how TBI-induced nerve damage leads to hearing impairment and other long-term health consequences.

Keywords:
Auditory systemCerebrospinal fluidEar damageHearing lossTraumatic brain injuryWallerian degeneration

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Area of Science:

  • Neurology
  • Otolaryngology
  • Trauma Research

Background:

  • Traumatic brain injury (TBI) causes immediate and secondary health adversities affecting multiple body systems.
  • TBI impacts the central, autonomous, and peripheral nervous systems, leading to physiological instability.
  • Secondary health adversities include nerve damage, blood-brain barrier pathology, and cerebrospinal fluid drainage issues.

Purpose of the Study:

  • To highlight normal hearing impairment resulting from TBI-induced nerve damage.
  • To discuss central-peripheral auditory dysfunction and long-term hearing loss post-TBI.
  • To examine associated health impacts linked to TBI and auditory dysfunction.

Main Methods:

  • Review of existing literature on TBI and its effects on the auditory system.
  • Analysis of TBI's impact on the outer, middle, and inner ear structures.
  • Examination of neurological pathways involved in auditory processing after TBI.

Main Results:

  • TBI causes primary damage to the auditory system, including outer, middle, and inner ear injuries.
  • Auditory nerve dysfunction, central auditory processing deficits, and vestibular schwannomas are common secondary consequences.
  • Hair cell damage and spiral ganglion injury contribute to long-term hearing loss.

Conclusions:

  • TBI significantly compromises normal hearing function through direct and indirect nerve damage.
  • Central-peripheral auditory dysfunction and progressive hearing loss are critical long-term sequelae of TBI.
  • Understanding these impacts is crucial for managing TBI patients and addressing associated health issues.