[Consensus statement on deep brain stimulation in Parkinson's disease].

Deep brain stimulation (DBS) is a surgical technique based on the placement of a programmable electrode into certain areas of central nervous system. DBS is nowadays a well established treatment for patients with Parkinson's disease (PD) and motor complications. However, there are controversies about several items, including the correct selection of patients and the best time for DBS. There is a current trend for DBS to be carried out at earlier stages of PD. A group of experts from Spanish Neurosurgical Society (Functional Surgery Study Group) and Spanish Neurological Society (Movement Disorders Study Group) wrote this consensus statement in order to clarify these and other items.