Final answer:
MRI studies show that children with Tourette syndrome have a thinning of the cerebral cortex, which is crucial for processing most of the brain's information.
Step-by-step explanation:
MRI studies of the brains of children with Tourette syndrome have revealed thinning of the cerebral cortex. The cerebral cortex is the highly folded, thin outer layer of the cerebrum where most information processing in the brain takes place. In Tourette syndrome, structural changes in the brain, like the thinning of the cerebral cortex, are of keen interest to researchers as they might relate to the symptoms of the condition.