Abstract：Obsessive-compulsive disorder (OCD) usually occurs in childhood / adolescence, and its pathogenesis is still unclear. However, with the development of neural imaging, magnetic resonance imaging has been widely used in the study of OCD, and has played an important role in exploring the mechanism of pediatric OCD. Existing studies have suggested that pediatric OCD have abnormalities in the brain regions. The structural abnormalities are mainly located in the frontal lobe, thalamus, temporal lobe, etc., and the functional abnormalities are mainly in the attention network, executive network, etc., indicating that the disease may be related to neurodevelopmental abnormalities. Therefore, this paper reviews the research progress of magnetic resonance imaging in children and adolescents with OCD, providing evidence for the pathogenesis of pediatric OCD.
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