Network analysis of human fMRI data suggests modular restructuring after simulated acquired brain injury

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• 作者：E. Ruiz Vargas ; D. G. V. Mitchell…
• 关键词：Networks ; Modularity ; Traumatic brain injuries
• 刊名：Medical and Biological Engineering and Computing
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：54
• 期：1
• 页码：235-248
• 全文大小：1,447 KB
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• 作者单位：E. Ruiz Vargas (1)
  D. G. V. Mitchell (2) (3)
  S. G. Greening (4)
  L. M. Wahl (5)
  
  1. Department of Clinical Neurological Sciences, Western University, London, ON, N6G 2V4, Canada
  2. The Brain and Mind Institute, Western University, London, ON, N6A 5B7, Canada
  3. Department of Psychiatry and Anatomy and Cell Biology, Schulich School of Medicine and Dentistry, Western University, London, ON, N6A 5B7, Canada
  4. Department of Psychology, Louisiana State University, 218 Audubon Hall, Baton Rouge, LA, 70803, USA
  5. Department of Applied Mathematics, Western University, London, ON, N6A 5B7, Canada
  
• 刊物类别：Engineering
• 刊物主题：Biomedical Engineering
  Human Physiology
  Imaging and Radiology
  Computer Applications
  Neurosciences
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1741-0444

文摘

The pathophysiology underlying neurocognitive dysfunction following mild traumatic brain injury (TBI), or concussion, is poorly understood. In order to shed light on the effects of TBI at the functional network or modular level, our research groups are engaged in the acquisition and analysis of functional magnetic resonance imaging data from subjects post-TBI. Complementary to this effort, in this paper we use mathematical and computational techniques to determine how modular structure changes in response to specific mechanisms of injury. In particular, we examine in detail the potential effects of focal contusions, diffuse axonal degeneration and diffuse microlesions, illustrating the extent to which functional modules are preserved or degenerated by each type of injury. One striking prediction of our study is that the left and right hemispheres show a tendency to become functionally separated post-injury, but only in response to diffuse microlesions. We highlight other key differences among the effects of the three modelled injuries and discuss their clinical implications. These results may help delineate the functional mechanisms underlying several of the cognitive sequelae associated with TBI.