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|  |Sensorimotor cortex and insula\citep{26538289} |More intense premonitory urges were associated with thinning in these areas.|  |  |Brain structural MRI in pediatric Tourette syndrome \citep{TSANIC:VBM:London} |A \citep{TSANIC:VBM:London}|A  large multisite study found TS children had greater gray matter volume in the posterior thalamus and hypothalamus-midbrain in addition to decreased white mater volume in the orbital prefrontal cortex and the anterior cingulate.| |  |Tourette syndrome and chronic tic disorder \citep{26531497} |Event-related potentials recordings, during a stimulus-response compatibility task, revealed increased parietal and central activation for both patient groups compared to the control group. The two patient groups were not significantly different from one another.|  |