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Related Experiment Video

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Aberrant dynamic Functional-Structural connectivity coupling of Large-scale brain networks in poststroke motor

Xiaoying Liu1, Shuting Qiu1, Xiaoyang Wang2

  • 1Department of Rehabilitation Medicine, The 900th Hospital of People's Liberation Army (Fuzhou General Hospital of Nanjing Military Region), Fuzhou, 350025, China.

Neuroimage. Clinical
|January 28, 2023
PubMed
Summary

Stroke disrupts brain network dynamics, altering functional-structural connectivity (FC-SC) coupling. Reduced FC-SC coupling correlates with motor dysfunction severity, especially in severe stroke cases.

Keywords:
Brain networksDiffusion tensor imagingDynamic FC-SC couplingResting-state fMRIStrokeTopological analysis

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Area of Science:

  • Neuroscience
  • Brain Network Dynamics
  • Stroke Rehabilitation

Background:

  • Stroke can cause significant brain reorganization, affecting both functional and structural networks.
  • Previous research suggests a link between functional and structural network changes post-stroke.
  • Dynamic changes in functional-structural relationships and their link to motor deficits remain unclear.

Purpose of the Study:

  • To investigate dynamic functional and structural connectivity (FC-SC) coupling in subcortical stroke.
  • To explore the relationship between dynamic FC-SC coupling and motor function severity.
  • To analyze network dynamics from a network perspective in stroke patients.

Main Methods:

  • Utilized resting-state fMRI and diffusion tensor imaging (DTI) in 39 stroke patients and 22 healthy controls.
  • Constructed structural networks using DTI tractography and calculated topological metrics.
  • Applied independent component analysis, sliding window, and k-means clustering to assess dynamic functional connectivity and states.

Main Results:

  • Stroke patients exhibited lower global efficiency in structural networks compared to controls.
  • Reduced local efficiency and FC-SC coupling were observed in stroke patients, particularly in specific dynamic states.
  • Severely affected patients showed significantly lower local efficiency and FC-SC coupling, strongly linked to motor dysfunction.

Conclusions:

  • Stroke patients, especially those with severe injuries, display abnormal dynamic FC-SC coupling.
  • These findings enhance understanding of the anatomical-functional interactions underlying motor deficits.
  • The results offer valuable insights for developing personalized stroke rehabilitation strategies.