Cited by 439Schizophrenia research and treatmentFunctional Brain Connectivity StudiesAdvanced Neuroimaging Techniques and Applications

Disrupted axonal fiber connectivity in schizophrenia

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Zalesky, Andrew, Fornito, Alex, Seal, Marc L., Cocchi, Luca, Westin, Carl-Fredrik, Bullmore, Edward T., Egan, Gary F., Pantelis, Christos·2011·Biological Psychiatry

Abstract

Background Schizophrenia is believed to result from abnormal functional integration of neural processes thought to arise from aberrant brain connectivity. However, evidence for anatomical dysconnectivity has been equivocal, and few studies have examined axonal fiber connectivity in schizophrenia at the level of whole-brain networks.Methods Cortico-cortical anatomical connectivity at the scale of axonal fiber bundles was modeled as a network. Eighty-two network nodes demarcated functionally specific cortical regions. Sixty-four direction diffusion tensor-imaging coupled with whole-brain tractography was performed to map the architecture via which network nodes were interconnected in each of 74 patients with schizophrenia and 32 age- and gender-matched control subjects. Testing was performed to identify pairs of nodes between which connectivity was impaired in the patient group. The connectional architecture of patients was tested for changes in five network attributes: nodal degree, small-worldness, efficiency, path length, and clustering.Results Impaired connectivity in the patient group was found to involve a distributed network of nodes comprising medial frontal, parietal/occipital, and the left temporal lobe. Although small-world attributes were conserved in schizophrenia, the cortex was interconnected more sparsely and up to 20% less efficiently in patients. Intellectual performance was found to be associated with brain efficiency in control subjects but not in patients.Conclusions This study presents evidence of widespread dysconnectivity in white-matter connectional architecture in a large sample of patients with schizophrenia. When considered from the perspective of recent evidence for impaired synaptic plasticity, this study points to a multifaceted pathophysiology in schizophrenia encompassing axonal as well as putative synaptic mechanisms.

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Crossref · 10.1016/j.biopsych.2010.08.022

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Authors
Zalesky, A., Fornito, A., Seal, M. L., Cocchi, L., Westin, C.-F., Bullmore, E. T., Egan, G. F., & Pantelis, C.
Affiliations
  • The University of Melbourne (AU)
  • Brigham and Women's Hospital (US)
  • University of Cambridge (GB)
Corresponding author
Zalesky, Andrew
Venue
Biological Psychiatry
Publisher
Elsevier BV
Published
2011-01
Volume
69
Issue
1
Pages
80-89
ISSN
0006-3223 (ISSN-L)
OpenAlex
W2053533857
Cited by
439
References
99
Citations by year
2026: 7 · 2025: 9 · 2024: 13 · 2023: 14 · 2022: 16 · 2021: 23 · 2020: 23 · 2019: 38 · 2018: 32 · 2017: 28 · 2016: 40 · 2015: 44 · 2014: 44 · 2013: 45 · 2012: 33
FWCI
22.90
Type
journal article
Language
en
Open access
Locations
  • Biological Psychiatry (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • Australian Schizophrenia Research Bank
  • National Health and Medical Research Council
  • Pratt Foundation
  • Ramsay Health Care
  • Viertel Charitable Foundation
  • Schizophrenia Research Institute
  • Human Brain Project
  • National Institute of Biomedical Imaging and Bioengineering
  • National Institute of Mental Health
  • Australian Research Council (DP0986320)
  • NHMRC (454797, 628386)
  • Ronald Phillip Griffith Fellowship
  • Swiss Academy of Medical Science
  • Swiss National Science Foundation (PASMP3 129357/1)
  • National Institutes of Health (R01MH074794)
  • Neuroimage Analysis Center (P41RR013218)
Topics
  • Health Sciences › Medicine › Psychiatry and Mental health › Schizophrenia research and treatment
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Functional Brain Connectivity Studies
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Advanced Neuroimaging Techniques and Applications
Keywords
schizophrenia, corticocortical connections, white matter, brain network efficiency, small-worldness, network topology, diffusion tensor imaging, tractography, cognitive performance, synaptic plasticity
MeSH terms
Adult, Brain Mapping, Cerebral Cortex, Female, Humans, Image Processing, Computer-Assisted, Male, Nerve Fibers, Myelinated, Nerve Net, Neural Pathways, Schizophrenia, Neural Networks, Computer, Diffusion Tensor Imaging

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