Inhibition is impaired in children with obsessive-compulsive symptoms but not in those with tics.

We suggest that the cognitive mechanisms underlying tics and compulsions controls are likely to be different. Possibly the preserved ability to suppress actions in uncomplicated Tourette patients allows them to experience a greater feeling of self-control, and this fact might play a key role in evolution of the disorder beyond adolescence. © 2018 International Parkinson and Movement Disorder Society.