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Toward neuroimaging-based network biomarkers for transient ischemic attack.

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Area of Science:

  • Neuroscience
  • Radiology
  • Medical Imaging

Background:

  • Stroke is linked to functional brain network disruptions.
  • Transient ischemic attack (TIA) is a major stroke risk factor, but its impact on brain networks is unclear.

Purpose of the Study:

  • To investigate topological alterations in functional brain networks in TIA patients.
  • To assess the reproducibility, substrates, and biomarker potential of these alterations.

Main Methods:

  • Multimodal MRI techniques were used to analyze functional brain networks in TIA patients.
  • Analyses included network efficiency, nodal centrality, and inter-hemispheric connectivity.

Main Results:

  • TIA patients showed decreased whole-brain network efficiency and nodal centrality in the insula and basal ganglia.
  • Impaired inter-hemispheric communication was observed.
  • Alterations correlated with high-density lipoprotein cholesterol levels and predicted future ischemic events.

Conclusions:

  • Functional brain networks exhibit characteristic dysfunctions in TIA.
  • These findings may inform TIA diagnosis, prognosis, and understanding of underlying mechanisms.