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Structural and Functional Amygdala Abnormalities in Hemifacial Spasm.

Hui Xu1,2,3, Chenguang Guo1, Haining Li1

  • 1Department of Medical Imaging, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China.

Frontiers in Neurology
|May 23, 2019
PubMed
Summary
This summary is machine-generated.

This study reveals structural and functional brain changes in hemifacial spasm (HFS) patients, specifically smaller right amygdala volume and altered connectivity linked to HFS severity and anxiety.

Keywords:
affective disordersfacial spasm scorefunctional connectivityhemifacial spasmsubcortical volumetric analysis

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Area of Science:

  • Neurology
  • Neuroscience
  • Medical Imaging

Background:

  • Hemifacial spasm (HFS) is a rare neuromuscular disorder causing involuntary facial muscle contractions.
  • Understanding the central neural mechanisms of HFS is crucial for effective treatment.

Purpose of the Study:

  • To investigate brain gray matter structure and resting-state functional connectivity (rsFC) in HFS patients.
  • To identify potential neural correlates of HFS pathophysiology.

Main Methods:

  • Structural MRI and resting-state BOLD imaging were used in 30 HFS patients and 30 controls.
  • Cortical thickness, subcortical volumes, and seed-based rsFC were analyzed.
  • Correlations with HFS severity and mood were performed.

Main Results:

  • HFS patients showed reduced right amygdala volume compared to controls.
  • Increased rsFC was observed between the right amygdala and medial prefrontal cortex, orbital frontal cortex, and posterior insula.
  • Amygdala connectivity correlated with HFS severity and anxiety levels.

Conclusions:

  • This study provides the first evidence of structural and functional brain abnormalities in HFS.
  • Amygdala volume and rsFC alterations may be key factors in HFS pathophysiology.
  • Findings offer novel insights into the neural basis of hemifacial spasm.