Related Experiment Video
Updated: Apr 20, 2026
Development of an Uncomplicated Mild Traumatic Brain Injury Model Modified by Weight-Drop Method and Evidenced by Magnetic Resonance Imaging
Published on: April 11, 2025
White matter integrity and cognition in mild traumatic brain injury following motor vehicle accident
Kunlin Xiong1, Yongshan Zhu1, Yulong Zhang1
1Department of Radiology, Daping Hospital, Third Military Medical University, Chongqing 400042, China.
Abstract:
The aim of this study is to explore the white matter structure integrity in patients with mild traumatic brain injury (mTBI) using diffusion tensor imaging (DTI), and to analyze the relationship between the white matter structure integrity and cognitive impairment of patients with mTBI. Twenty-five patients with mTBI and 25 healthy control subjects were studied with conventional MR imaging and diffusion tensor imaging. Fractional anisotropy (FA) and mean diffusivity (MD) maps of patients with mTBI were calculated and compared, with these control maps using tract-based spatial statistics (TBSS). Significantly lower fractional anisotropy was found in patients in the uncinate fasciculus, superior longitudinal fasciculus, inferior longitudinal fasciculus, and internal capsule. Mean diffusivity was significantly elevated in the body of corpus callosum, uncinate fasciculus, superior longitudinal fasciculus, and internal capsule in the mTBI group compared with the control group (P<0.05). The mTBI group showed a significant negative correlation between the elevated mean diffusivity of the uncinate fasciculus and the working memory index (WMI) (R(2)=0.51, P<0.05), and the internal capsule of MD values was significantly negatively related to processing speed index (PSI) (R(2)=0.45, P<0.05). There was a positive correlation between the FA value of the uncinate fasciculus and Mini Mental State Examination (MMSE) in the mTBI patient group (R(2)=0.36, P<0.05). TBSS analysis of DTI suggests that patients with mTBI have focal axonal injury, and the pathophysiology is significantly related to the MMSE and IQ of mTBI patients. Diffusion tensor imaging can be a powerful technique for in vivo detection of mTBI, and can help in the diagnosis of patients with mTBI.
Insights
Diffusion tensor imaging reveals white matter damage in mild traumatic brain injury (mTBI) patients, correlating with cognitive deficits. This technique aids in diagnosing mTBI by detecting axonal injury.
Area of Science:
- Neuroimaging
- Neurology
- Radiology
Background:
- Mild traumatic brain injury (mTBI) can cause subtle white matter changes.
- Assessing white matter integrity is crucial for understanding mTBI-related cognitive impairment.
Purpose of the Study:
- To investigate white matter structure integrity in mTBI patients using diffusion tensor imaging (DTI).
- To analyze the relationship between white matter integrity and cognitive function in mTBI.
Main Methods:
- Conventional MRI and DTI were performed on 25 mTBI patients and 25 controls.
- Tract-based spatial statistics (TBSS) analyzed fractional anisotropy (FA) and mean diffusivity (MD) maps.
- Correlations between DTI metrics and cognitive scores (MMSE, WMI, PSI) were examined.
Main Results:
- mTBI patients showed significantly lower FA in key white matter tracts (uncinate, superior/inferior longitudinal fasciculi, internal capsule).
- Elevated MD was observed in the corpus callosum, uncinate fasciculus, superior longitudinal fasciculus, and internal capsule of mTBI patients.
- Negative correlations found between MD in the uncinate fasciculus and working memory, and MD in the internal capsule and processing speed. Positive correlation between FA and MMSE scores.
Conclusions:
- DTI reveals focal axonal injury in mTBI, detectable via reduced FA and increased MD.
- White matter alterations in mTBI are significantly related to cognitive impairments, including MMSE and IQ.
- DTI is a powerful in vivo tool for detecting and diagnosing mTBI.
