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Related Experiment Video

Updated: Aug 12, 2025

Diffusion Tensor Magnetic Resonance Imaging in the Analysis of Neurodegenerative Diseases
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Brain White Matter Structural Alteration in Hemifacial Spasm: A Diffusion Tensor Imaging Study.

Tianran Zhang1, Chuan Zhao1, Xianlong Qi2

  • 1Clinical College, Jining Medical University.

The Journal of Craniofacial Surgery
|February 2, 2023
PubMed
Summary
This summary is machine-generated.

White matter damage in the brain

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Area of Science:

  • Neuroimaging
  • Neurology
  • Diffusion Tensor Imaging

Background:

  • Hemifacial spasm (HFS) is a neurological disorder characterized by involuntary contractions of facial muscles.
  • The underlying neurobiological mechanisms of HFS, particularly white matter alterations, require further investigation.

Purpose of the Study:

  • To investigate whole-brain white matter structural changes in patients with hemifacial spasm (HFS) using tract-based spatial statistics (TBSS).
  • To explore the correlation between white matter microstructural integrity and clinical features of HFS.

Main Methods:

  • Diffusion tensor imaging (DTI) data were acquired from 29 HFS patients and 29 healthy controls.
  • Tract-based spatial statistics (TBSS) was employed to analyze differences in white matter integrity, including fractional anisotropy (FA) and diffusivity metrics.
  • Correlations between diffusion metrics and clinical variables (disease duration, spasm severity) were assessed.

Main Results:

  • HFS patients showed significantly reduced FA in the forceps minor, bilateral anterior thalamic radiation, and right superior longitudinal fasciculus compared to controls.
  • Lower FA in the forceps minor was negatively correlated with the severity of hemifacial spasm (Cohen grading scale).

Conclusions:

  • White matter fiber tract injury, specifically in the forceps minor, bilateral anterior thalamic radiation, and right superior longitudinal fasciculus, is present in HFS patients.
  • Alterations in the genu-of-corpus-callosum-cortex circuit, reflected by FA changes in the forceps minor, are implicated in the pathophysiology of HFS.
  • Further research into superior longitudinal fasciculus changes in HFS is warranted.