deletions | additions       diff --git a/Pathophysiology.md b/Pathophysiology.md  index 1d12456..d1b137e 100644  --- a/Pathophysiology.md  +++ b/Pathophysiology.md 
...
|  |Brain structural MRI in pediatric Tourette syndrome \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.|  |  |Electrophysiological similarities in Tourette syndrome and chronic tic disorder \citep{26531497} |  Event-related |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 different from one another.| |  |Event-related topography and the effect of comorbidities|  P300 comorbidities|P300  amplitude in the frontal region was reduced for TS patients with comorbid symptoms compared to control subjects while a medication-naive TS group with no comorbid conditions was similar to the control group. ### Clinical and neuropsychological studies