@ARTICLE{10.3389/fnhum.2013.00302, AUTHOR={Kim, Seung-Goo and Jung, Wi Hoon and Kim, Sung Nyun and Jang, Joon Hwan and Kwon, Jun Soo}, TITLE={Disparity between dorsal and ventral networks in patients with obsessive-compulsive disorder: evidence revealed by graph theoretical analysis based on cortical thickness from MRI}, JOURNAL={Frontiers in Human Neuroscience}, VOLUME={7}, YEAR={2013}, URL={https://www.frontiersin.org/articles/10.3389/fnhum.2013.00302}, DOI={10.3389/fnhum.2013.00302}, ISSN={1662-5161}, ABSTRACT={As one of the most widely accepted neuroanatomical models on obsessive-compulsive disorder (OCD), it has been hypothesized that imbalance between an excitatory direct (ventral) pathway and an inhibitory indirect (dorsal) pathway in cortico-striato-thalamic circuit underlies the emergence of OCD. Here we examine the structural network in drug-free patients with OCD in terms of graph theoretical measures for the first time. We used a measure called efficiency which quantifies how a node transfers information efficiently. To construct brain networks, cortical thickness was automatically estimated using T1-weighted magnetic resonance imaging. We found that the network of the OCD patients was as efficient as that of healthy controls so that the both networks were in the small-world regime. More importantly, however, disparity between the dorsal and the ventral networks in the OCD patients was found in terms of graph theoretical measures, suggesting a positive evidence to the imbalance theory on the underlying pathophysiology of OCD.} }