JOURNAL ARTICLE

Deep brain stimulation for Gilles de la Tourette syndrome: a case series targeting subregions of the globus pallidus internus

Raul Martínez-Fernández, Ludvic Zrinzo, Iciar Aviles-Olmos, Marwan Hariz, Irene Martinez-Torres, Eileen Joyce, Marjan Jahanshahi, Patricia Limousin, Thomas Foltynie
Movement Disorders: Official Journal of the Movement Disorder Society 2011 August 15, 26 (10): 1922-30
21538528
Deep brain stimulation remains an experimental treatment for patients with Gilles de la Tourette syndrome. Currently, a major controversial issue is the choice of brain target that leads to optimal patient outcomes within a presumed network of basal ganglia and cortical pathways involved in tic pathogenesis. This report describes our experience with patients with severe refractory Gilles de la Tourette syndrome treated with globus pallidus internus deep brain stimulation. Five patients were selected for surgery, 2 targeting the posteroventral globus pallidus internus and 2 targeting the anteromedial region. The remaining patient was first targeted on the posterolateral region, but after 18 months the electrodes were relocated in the anteromedial area. Tics were clinically assessed in all patients pre- and postoperatively using the Modified Rush Video protocol and the Yale Global Tic Severity Scale. Obsessive-compulsive behaviors were quantified with the Yale-Brown Obsessive Compulsive Scale. The Gilles de la Tourette Syndrome-Quality of Life Scale was also completed. All patients experienced improvements in tic severity but to variable extents. More convincing improvements were seen in patients with electrodes sited in the anteromedial region of the globus pallidus internus than in those with posterolateral implants. Mean reduction in the Modified Rush Video Rating scale for each group was 54% and 37%, respectively. Our open-label limited experience supports the use of the anteromedial globus pallidus internus as a promising target for future planned randomized double-blind trials of deep brain stimulation for patients with Gilles de la Tourette syndrome.

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