ArticlePsychological medicine2025
Exploring connectivity and volume alterations in the Pulvinar's subnuclei: insights into the neuropathological role in obsessive-compulsive disorder (OCD).
Article in Psychological medicine, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundPrevious research has highlighted abnormalities in the pulvinar region of the brain among individuals diagnosed with obsessive-compulsive disorder (OCD). Nevertheless, given the pulvinar's complex structure, comprising four distinct subnuclei (PuA, PuI, PuL, and PuM), inconsistencies persist regarding both structural and connectivity alterations within this region.
methods3D T1-weighted magnetic resonance imaging (MRI) and resting-state functional magnetic resonance imaging (rs-fMRI) were used on a cohort consisting of 41 healthy controls and 51 individuals with OCD in order to compare pulvinar connectivity and gray matter volume. Our aim was to compare both connectivity patterns and gray matter volume (GMV) within the PuA, PuI, PuL, and PuM subnuclei between the two groups. First, we examined resting-state connectivity differences in these subnuclei, followed by an analysis of GMV discrepancies to elucidate the potential neuropathological role of the pulvinar in OCD.
resultsOur findings revealed significant connectivity differences in the left PuL, the right PuA, and the left PuA between OCD patients and healthy controls (
conclusionsOur study identified functional connectivity alterations within specific subnuclei, including the left and right PuA, and the left PuL, alongside GMV changes in the left PuA. These observations suggest that these distinct regions of the pulvinar may contribute to the pathophysiology of OCD through differences in both functional connectivity and GMV compared to healthy controls.
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