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Psychiatry"],"abstract":"<jats:p><jats:bold>Objective:<\/jats:bold> This study examined whether obsessive-compulsive disorder (OCD) patients have gray matter abnormalities in regions related to executive function, and whether such abnormalities are associated with impaired executive function.<\/jats:p><jats:p><jats:bold>Methods:<\/jats:bold> Multiple scales were administered to 27 first-episode drug-na\u00efve OCD patients and 29 healthy controls. Comprehensive brain morphometric indicators of orbitofrontal cortex (OFC) and three striatum areas (caudate, putamen, and pallidum) were determined. Hemisphere lateralization index was calculated for each region of interest. Correlations between lateralization index and psychological variables were examined in OCD group.<\/jats:p><jats:p><jats:bold>Results:<\/jats:bold> The OCD group had greater local gyrification index for the right OFC and greater gray matter volumes of the bilateral putamen and left pallidum than healthy controls. They also had weaker left hemisphere superiority for local gyrification index of the OFC and gray matter volume of the putamen, but stronger left hemisphere superiority for gray matter volume of the pallidum. Patients' lateralization index for local gyrification index of the OFC correlated negatively with Yale-Brown Obsessive Compulsive Scale and Dysexecutive Questionnaire scores, respectively.<\/jats:p><jats:p><jats:bold>Conclusion:<\/jats:bold> Structural abnormalities of the bilateral putamen, left pallidum, and right OFC may underlie OCD pathology. 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