White matter abnormalities in children and adolescents with obsessive-compulsive disorder: a diffusion tensor imaging...

Area of Science:

• Neuroimaging
• Pediatric Psychiatry
• Neuroscience

Background:

• Limited data exists on white matter (WM) abnormalities in juvenile obsessive-compulsive disorder (OCD).
• Understanding WM changes is crucial for diagnosing and treating pediatric OCD.

Purpose of the Study:

• To identify white matter (WM) microstructure alterations in children and adolescents diagnosed with OCD.
• To compare WM integrity between juvenile OCD patients and healthy controls.

Main Methods:

• Diffusion tensor imaging (DTI) was performed on 15 juvenile OCD patients and 15 matched healthy controls.
• Voxelwise analyses using tract-based spatial statistics (TBSS) were employed to examine WM microstructure differences.

Main Results:

• Juvenile OCD patients exhibited significant differences in axial and radial diffusivities compared to controls.
• Increased axial diffusivity was observed in the corpus callosum, superior and inferior longitudinal fasciculi, cingulum, anterior thalamic radiations, internal capsule, and middle cerebellar peduncle.
• Increased radial diffusivity was noted in several WM tracts, including the corpus callosum, superior and inferior longitudinal fasciculi, uncinate fasciculi, anterior thalamic radiation, inferior fronto-occipital fasciculus, internal capsule, and cerebellar peduncles.

Conclusions:

• Findings indicate widespread white matter (WM) tract involvement in juvenile obsessive-compulsive disorder (OCD).
• This suggests potential involvement of parietal cortex, lateral prefrontal cortex, and limbic system, in addition to established orbitofrontal-striato-thalamo-cortical circuitry.
• Observed WM differences may reflect underlying myelination changes in pediatric OCD.