Motor Improvement and Emotional Stabilization in Patients With Tourette Syndrome After Deep Brain Stimulation of the Ventral Anterior and Ventrolateral Motor Part of the Thalamus

BackgroundSince its first application in 1999, the potential benefit of deep brain stimulation (DBS) in reducing symptoms of otherwise treatment-refractory Tourette syndrome (TS) has been documented in several publications. However, uncertainty regarding the ideal neural targets remains, and the eventuality of so far undocumented but possible negative long-term effects on personality fuels the debate about the ethical implications of DBS.MethodsIn this prospective open-label trial, eight patients (three female, five male) 19–56 years old with severe and medically intractable TS were treated with high-frequency DBS of the ventral anterior and ventrolateral motor part of the thalamus. To assess the course of TS, its clinical comorbidities, personality parameters, and self-perceived quality of life, patients underwent repeated psychiatric assessments at baseline and 6 and 12 months after DBS onset.ResultsAnalysis indicated a strongly significant and beneficial effect of DBS on TS symptoms, trait anxiety, quality of life, and global functioning with an apparently low side-effect profile. In addition, presurgical compulsivity, anxiety, emotional dysregulation, and inhibition appeared to be significant predictors of surgery outcome.ConclusionsTrading off motor effects and desirable side effects against surgery-related risks and negative implications, stimulation of the ventral anterior and ventrolateral motor part of the thalamus seems to be a valuable option when considering DBS for TS.