Deep brain stimulation of the subthalamic nucleus has been proved to be an
effective treatment for advanced Parkinson's disease when therapeutical str
ategies have failed. A correct selection of candidates for surgery is funda
mental to obtain a good clinical effect. In this study we present our proto
col of patient selection. In addition we report the data relative to the di
fferent causes of exclusion and the clinical efficacy of the electrical sti
mulation of the subthalamic nucleus at 3 months and 1 year follow-up.