Related Experiment Video
Updated: Apr 27, 2026

Evaluation of the Cognitive Performance of Hypertensive Patients with Silent Cerebrovascular Lesions
Published on: April 23, 2021
Structural network efficiency is associated with cognitive impairment in small-vessel disease
Andrew J Lawrence1, Ai Wern Chung2, Robin G Morris2
1From the Stroke & Dementia Research Centre (A.J.L., A.W.C., T.R.B.), St George's University of London; Department of Psychology (R.G.M.), Institute of Psychiatry, King's College London; and Clinical Neurosciences (H.S.M.), University of Cambridge, UK. alawrenc@sgul.ac.uk.
Cerebral small-vessel disease (SVD) disrupts brain network connectivity, impacting cognitive function. Network efficiency measures are stronger predictors of cognitive decline than conventional MRI markers in SVD patients.
Area of Science:
- Neuroimaging
- Neurology
- Medical Science
Background:
- Cerebral small-vessel disease (SVD) is a common cause of stroke and cognitive impairment.
- The impact of SVD on brain network connectivity is not fully understood.
Purpose of the Study:
- To characterize brain network connectivity impairment in SVD.
- To investigate the relationship between network connectivity, MRI markers, and cognitive function in SVD.
Main Methods:
- Cross-sectional study using diffusion tensor tractography and graph-based efficiency analysis.
- Compared structural connectivity networks in 115 SVD patients and 50 healthy controls.
- Examined associations between network efficiency, MRI markers (leukoaraiosis, lacunar infarction), and cognitive tests.
Main Results:
- SVD patients exhibited significantly reduced network density, lower connection weights, and disrupted network efficiency.
- Network disruption severity correlated with MRI disease markers and cognitive impairment.
- Network measures were stronger predictors of cognitive function than conventional MRI markers.
Conclusions:
- Brain network connectivity is significantly disturbed in SVD.
- Network disruption mediates the relationship between MRI markers and cognitive dysfunction in SVD.
- Network measures show promise as biomarkers for SVD in future treatment studies.
Related Concept Videos
Dementia l: Introduction
Ischemic Stroke ll: Pathophysiology
Alzheimer Disease ll: Pathophysiology
Ischemic Stroke l: Introduction

