Deep brain stimulation of Anteromedial Globus Pallidus internus improved OCD rather than tics in a Tourette's syndrome patient

After performing DBS surgery on a patient with Tourette syndrome, significant improvement was observed in OCD, but the tic remained unchanged, which contradicts previous studies. Herein we discuss that fluctuations in the therapeutic outcomes may be due to differences in physiological conditions tic- or OCD-specified pathways.