Tic Suppression in Children With Recent-Onset Tics Predicts 1-Year Tic Outcome

• Published in: Journal of child neurology 2019-10, Vol.34 (12), p.757-764
• Main Authors: Kim, Soyoung, Greene, Deanna J., Robichaux-Viehoever, Amy, Bihun, Emily C., Koller, Jonathan M., Acevedo, Haley, Schlaggar, Bradley L., Black, Kevin J.
• Format: Article
• Language: English
• ISSN: 0883-0738; 1708-8283
• DOI: 10.1177/0883073819855531

Successful voluntary tic suppression is a key component of the behavioral interventions that are used to treat tic disorders. This study aimed to examine tic suppression in children with recent-onset tics and determine whether the capacity to suppress tics predicts future tic severity. We tested 45 children (30 male, mean age 7.74 years) with recent-onset tics (mean 3.47 months prior to the first study visit; baseline) and re-examined each child at the 12-month anniversary of the first recognized tic (follow-up). At the baseline visit, children performed a tic suppression task with several conditions: tic freely, inhibit tics given a verbal request, and inhibit tics in the presence of a reward. At the baseline visit, children with tics for only a few months could suppress their tics, and tic suppression was especially successful when they received an immediate and contingent reward. Additionally, the ability to suppress tics in the presence of a reward predicted tic severity at follow-up. These findings suggest that better inhibitory control of tics within months of tic onset may be an important predictor of future tic symptom outcome.