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Abstract #2052

More than just axons: A positive relationship between an intracellular isotropic diffusion signal & pubertal development in white matter regions

Benjamin T Newman1,2, James T Patrie3, and T Jason Druzgal1
1Department of Radiology and Medical Imaging, University of Virginia, Charlottesville, VA, United States, 2Brain Institute, University of Virginia, Charlottesville, VA, United States, 3Department of Public Health Sciences, University of Virginia, Charlottesville, VA, United States

Understanding how the brain develops during adolescence is important for evaluating neuronal developments that affect mental health throughout the lifespan. This study uses 3-tissue constrained spherical deconvolution (3T-CSD) to examine the relationship between brain diffusion microstructure in deep white matter ROIs and pubertal development in a cross-sectional group of 4752 adolescents. An anisotropic diffusion signal fraction was found to have a negative correlation, while an intracellular isotropic diffusion signal fraction had a positive correlation with pubertal development across the majority of axonal ROIs. These results provide evidence for complex microstructural changes in brain development within the white matter skeleton.

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