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Related Experiment Video

Updated: Jan 18, 2026

In Vivo Morphometric Analysis of Human Cranial Nerves Using Magnetic Resonance Imaging in Menière's Disease Ears and Normal Hearing Ears
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Cortical Structure Abnormalities in Patients With Noise-Induced Hearing Loss: A Surface-Based Morphometry Study.

Yunxin Li1, Ranran Huang1, Aijie Wang1

  • 1Radiology Department, Yantaishan Hospital, Yantai, Shandong, China.

Brain and Behavior
|September 10, 2025
PubMed
Summary

Noise-induced hearing loss (NIHL) alters brain structure, particularly in auditory-visual network regions like the parietal and occipital lobes. These changes correlate with hearing impairment and anxiety, offering new insights into NIHL neurobiology.

Keywords:
cortical thicknesscortical volumenoise‐induced hearing losssource‐based morphometrysurface area

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Area of Science:

  • Neuroimaging
  • Auditory Neuroscience
  • Neuroplasticity

Background:

  • Noise-induced hearing loss (NIHL) is a growing public health concern.
  • The impact of NIHL on brain structure and function is not fully understood.
  • Source-based morphometry (SBM) offers a novel approach to investigate brain alterations in NIHL.

Purpose of the Study:

  • To characterize brain structure changes in NIHL patients using SBM.
  • To explore correlations between altered brain regions and clinical data in NIHL.
  • To elucidate the neurobiological mechanisms underlying NIHL.

Main Methods:

  • Acquired high-resolution 3D T1 structural MRI scans from 81 NIHL patients and 74 healthy controls (HCs).
  • Collected clinical data including noise exposure, hearing thresholds (MTWV), MMSE, and HAMA scores.
  • Performed whole-brain SBM analysis using FreeSurfer to assess cortical thickness, surface area, and volume.

Main Results:

  • NIHL patients exhibited increased cortical thickness in the left inferior parietal gyrus (IPG) and right superior parietal gyrus (SPG).
  • Increased surface area and volume were observed in the left lateral occipital gyrus (LOG) of NIHL patients.
  • Cortical changes correlated with monaural hearing threshold weighted values (MTWV) and Hamilton Anxiety Scale (HAMA) scores.

Conclusions:

  • NIHL is associated with significant alterations in cortical morphology within auditory-visual network regions.
  • These structural changes suggest auditory deprivation can induce cortical restructuring.
  • Findings provide novel insights into the neurobiology and brain activity abnormalities in NIHL.