Microstructural white-matter abnormalities and their relationship with cognitive dysfunction in obsessive-compulsive disorder

Brain and Behavior
Paola MagioncaldaEmily R Stern

Abstract

In recent years, diffusion tensor imaging (DTI) studies have detected subtle microstructural abnormalities of white matter (WM) in obsessive-compulsive disorder (OCD). However, findings have been inconsistent, and it is unclear whether WM abnormalities are related to cognitive processes. The aim of this study was to explore the relationship of WM alterations with cognitive variables in OCD in order to investigate the structural correlates of behaviorally relevant features of the disorder. We compared DTI-derived fractional anisotropy (FA), mean diffusivity (MD), and radial diffusivity (RD) measures between OCD patients (n = 16) and healthy controls (n = 18) using a whole-brain tract-based spatial statistics (TBSS) approach. We also explored the correlations of WM alterations with clinical and cognitive variables. Patients with OCD demonstrated increases in MD in the bilateral posterior corona radiata; left anterior corona radiata; bilateral superior longitudinal fasciculus; genu, body, and splenium of the corpus callosum; and left posterior limb of the internal capsule. An increase in RD values was also found in some of the same tracts (right posterior corona radiata, right superior longitudinal fasciculus, left anterior corona...Continue Reading

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Citations

Jan 24, 2019·Frontiers in Psychology·Cristelle RodriguezPanteleimon Giannakopoulos

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Methods Mentioned

BETA
PCR
pharmacotherapy

Software Mentioned

FSL
TBSS
FMRIB
FMRIB58
Diffusion Toolbox ( FDT )

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