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Related Experiment Video

Updated: Jan 27, 2026

A Mouse Model of Single and Repetitive Mild Traumatic Brain Injury
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Single Mild Traumatic Brain Injury Deteriorates Progressive Interhemispheric Functional and Structural Connectivity.

Zhuonan Wang1,2, Ming Zhang2, Chuanzhu Sun1

  • 1The Key Laboratory of Biomedical Information Engineering, Ministry of Education, Department of Biomedical Engineering, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, China.

Journal of Neurotrauma
|April 2, 2019
PubMed
Summary

Mild traumatic brain injury (mTBI) causes persistent, time-dependent damage to the corpus callosum (CC), affecting structural and functional connectivity. This brain injury impacts executive function, highlighting the CC

Keywords:
corpus callosumlongitudinal studymild traumatic brain injuryneurodegenerative diseasesvoxel-mirrored homotopic connectivity

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Area of Science:

  • Neuroscience
  • Neurology
  • Brain Imaging

Background:

  • Mild traumatic brain injury (mTBI) is a common yet complex neurological condition.
  • Understanding the long-term effects of mTBI on brain connectivity is crucial for effective treatment.
  • The corpus callosum (CC) is vital for interhemispheric communication and is vulnerable to injury.

Purpose of the Study:

  • To investigate dynamic changes in structural and functional connectivity within the CC in mTBI patients over one year.
  • To correlate imaging findings with clinical and neuropsychological outcomes.
  • To elucidate the role of CC integrity in the chronic phase of mTBI.

Main Methods:

  • Longitudinal study of 42 mTBI patients and 42 controls over 1 year.
  • Utilized diffusion tensor imaging (DTI) and resting-state functional magnetic resonance imaging (rs-fMRI).
  • Employed DTI-based tractography and voxel-mirrored homotopic connectivity analyses on specific CC segments.

Main Results:

  • mTBI patients showed persistent, time-dependent, and regionally specific loss of CC structural integrity.
  • Impairments progressed across CC segments from subacute to chronic stages.
  • Reduced structural connectivity correlated with altered functional connectivity and poorer executive function, particularly linked to dorsolateral prefrontal cortex changes.

Conclusions:

  • The CC is a critical indicator of widespread cerebral pathology in mTBI.
  • Persistent CC damage significantly impacts interhemispheric functional connectivity and cognitive deficits.
  • Longitudinal assessment of CC integrity is essential for understanding mTBI progression and its neurological consequences.