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Related Experiment Video

Updated: Jan 20, 2026

Author Spotlight: Using Motor Imagery Brain-Computer Interface to Improve Motor and Cognitive Function in Stroke Patients
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Structural Disconnections Explain Brain Network Dysfunction after Stroke.

Joseph C Griffis1, Nicholas V Metcalf1, Maurizio Corbetta2

  • 1Department of Neurology, Washington University School of Medicine, St. Louis, MO 63110, USA.

Cell Reports
|September 5, 2019
PubMed
Summary
This summary is machine-generated.

Stroke-induced brain network disruptions are primarily caused by structural disconnection (SDC) of white matter pathways, not just focal damage. Interhemispheric SDCs significantly impact functional connectivity and behavioral deficits after stroke.

Keywords:
brain networksdiffusion MRIfunctional MRIfunctional connectivitylesionresting statestrokestructural connectivitystructural disconnectionstructure-function

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Area of Science:

  • Neuroscience
  • Neurology
  • Medical Imaging

Background:

  • Stroke often results in focal brain lesions, leading to disruptions in functional connectivity (FC) across brain networks.
  • It is commonly believed that these FC disruptions stem from damage to specific cortical regions.

Purpose of the Study:

  • To compare the explanatory power of structural disconnection (SDC) versus focal cortical damage in accounting for stroke-related FC disruptions.
  • To investigate the relationship between SDC, FC, and behavioral deficits in stroke patients.

Main Methods:

  • Analysis of data from 114 stroke patients.
  • Comparison of structural disconnection (SDC) measures with focal damage measures.
  • Assessment of structure-function covariation and correlation with behavioral deficits.

Main Results:

  • Structural disconnection (SDC) measures were superior to focal damage measures in explaining functional connectivity (FC) disruptions post-stroke.
  • A core mode of structure-function covariation was identified, linking interhemispheric SDCs to widespread FC disruptions.
  • The severity of interhemispheric SDCs correlated with deficits in multiple behavioral domains.

Conclusions:

  • A lesion's impact on the structural connectome, particularly interhemispheric white matter pathways, is the primary determinant of its effect on functional connectivity (FC) after stroke.
  • Structural disconnection, rather than focal cortical damage, is the key mechanism underlying FC disruptions and associated behavioral impairments in stroke.