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Objective: To explore the relationship between regional cerebral blood flow (CBF) and cognitive function in obsessive-compulsive disorder (OCD). Method: Single-photon emission computed tomography (SPECT) was performed for 139 OCD patients and 139 controls, and the radioactivity rate (RAR) was calculated. Cognitive function was assessed by the Wisconsin Card Sorting Test (WCST). Results: The RARs of the prefrontal, anterior temporal, and right occipital lobes were higher in patients thandoi:10.1590/0004-282x20130205 pmid:24637982 fatcat:onf2gqbkarhilaoprjjql5lqsa