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Cingulum-Callosal white-matter microstructure associated with emotional dysregulation in children: A diffusion tensor
Yuwen Hung1, Mai Uchida2, Schuyler L Gaillard3
1Athinoula A. Martinos Imaging Center at the McGovern Institute for Brain Research, Massachusetts Institute of Technology and Harvard University, Cambridge, MA 02139, United States; Department of Brain and Cognitive Sciences, Cambridge, MIT, MA 02139, United States.
Insights
Children with emotional dysregulation show altered white matter in brain regions linked to mood disorders. Diffusion tensor imaging (DTI) revealed microstructural differences in the cingulum-callosal pathways, suggesting a neurodevelopmental vulnerability.
Area of Science:
- Neuroscience
- Developmental Psychology
- Medical Imaging
Background:
- Emotional dysregulation in youth is a significant risk factor for mood disorders.
- Identifying the neural mechanisms underlying emotional dysregulation is crucial for early intervention.
- Pediatric mood disorders have a substantial impact on mental health and well-being.
Purpose of the Study:
- To investigate the relationship between white-matter microstructure and emotional dysregulation severity in children.
- To identify specific brain regions and white-matter pathways associated with emotional dysregulation using diffusion tensor imaging (DTI).
- To explore potential neurodevelopmental vulnerabilities for pediatric mood disorders.
Main Methods:
- Utilized diffusion tensor imaging (DTI) to examine white-matter microstructure in 32 children.
- Measured emotional dysregulation severity using the Child Behavior Checklist Emotional Dysregulation Profile (including Attention, Aggression, and Anxiety/Depression subscales).
- Performed whole-brain voxel-wise regression analyses to correlate DTI metrics with emotional dysregulation scores.
Main Results:
- Found significantly increased radial diffusivity (RD) in the cingulum-callosal regions associated with higher emotional dysregulation.
- Observed decreased fractional anisotropy (FA) in the cingulum-callosal pathways correlating with increased emotional dysregulation severity.
- These microstructural variations were anatomically specific to the cingulum-callosal white-matter tracts.
Conclusions:
- Microstructural differences in cingulum-callosal white-matter pathways are linked to pediatric emotional dysregulation.
- These findings suggest a potential neurodevelopmental basis for mood disorders in children.
- The identified neural targets may aid in early identification and prevention strategies for pediatric mood disorders.
Abstract:
Emotional dysregulation symptoms in youth frequently predispose individuals to increased risk for mood disorders and other mental health difficulties. These symptoms are also known as a behavioral risk marker in predicting pediatric mood disorders. The underlying neural mechanism of emotional dysregulation, however, remains unclear. This study used the diffusion tensor imaging (DTI) technique to identify anatomically specific variation in white-matter microstructure that is associated with pediatric emotional dysregulation severity. Thirty-two children (mean age 9.53 years) with varying levels of emotional dysregulation symptoms were recruited by the Massachusetts General Hospital and underwent the DTI scans at Massachusetts Institute of Technology. Emotional dysregulation severity was measured by the empirically-derived Child Behavior Checklist Emotional Dysregulation Profile that includes the Attention, Aggression, and Anxiety/Depression subscales. Whole-brain voxel-wise regression tests revealed significantly increased radial diffusivity (RD) and decreased fractional anisotropy (FA) in the cingulum-callosal regions linked to greater emotional dysregulation in the children. The results suggest that microstructural differences in cingulum-callosal white-matter pathways may manifest as a neurodevelopmental vulnerability for pediatric mood disorders as implicated in the clinical phenotype of pediatric emotional dysregulation. These findings may offer clinically and biologically relevant neural targets for early identification and prevention efforts for pediatric mood disorders.
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