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Abnormal inter-hemispheric functional cooperation in blepharospasm.

Jian-Ping Liu1,2,3, Yu-Fang Gu3, Yang Shi4

  • 1Department of Neurology, Affiliated Hospital 6 of Nantong University, Yancheng, China.

Frontiers in Neurology
|November 17, 2025
PubMed
Summary
This summary is machine-generated.

Blepharospasm patients exhibit increased inter-hemispheric functional connectivity in motor brain regions, potentially indicating a compensatory mechanism. This study offers new insights into blepharospasm

Keywords:
blepharospasminter-hemispheric functional cooperationprecentral gyrusputamenresting-state functional magnetic resonance imaging

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Area of Science:

  • Neuroscience
  • Neurology
  • Medical Imaging

Background:

  • Blepharospasm involves involuntary orbicularis oculi muscle contractions, impacting quality of life.
  • The underlying pathophysiology of blepharospasm is not fully understood.
  • Inter-hemispheric brain cooperation is crucial for human brain function.

Purpose of the Study:

  • To investigate inter-hemispheric functional cooperation in blepharospasm patients.
  • To identify neural disruptions in blepharospasm using resting-state functional magnetic resonance imaging (rs-fMRI).
  • To examine connectivity between functionally homotopic voxels (CFH) in blepharospasm.

Main Methods:

  • Recruited 30 blepharospasm patients and 30 matched healthy controls.
  • Utilized rs-fMRI to generate CFH maps for voxel-level inter-hemispheric connectivity.
  • Performed group comparisons and correlation analyses with clinical variables.

Main Results:

  • Blepharospasm patients showed significantly increased CFH in the left putamen and left precentral gyrus compared to controls.
  • Aberrant CFH values did not correlate with clinical variables like disease duration or Jankovic Rating Scale scores.
  • Findings highlight altered functional connectivity in motor-related brain areas.

Conclusions:

  • Identified increased inter-hemispheric functional connectivity (FC) in motor regions in blepharospasm.
  • Observed hyperconnectivity in the putamen and precentral gyrus may represent a compensatory mechanism.
  • Suggests modulating inter-hemispheric communication as a potential therapeutic target for blepharospasm.