Complications were observed in two patients : one had a left homonymous hemianopsia after pallidotomy and another one developed left hemiballistic movements 3 days after subthalamotomy which partly improved within 1 month with Valproate 1000 mg/day .
O O O O O B-OrganismTaxon O O O O O B-DiseaseOrPhenotypicFeature I-DiseaseOrPhenotypicFeature O O O O O O O O O O O O O O O O O O O O B-ChemicalEntity O O O