Electrophysiological Activity of the Subthalamic Nucleus During the Processing of Emotional and Motivational Information

Inclusion Criteria: * Patient with Parkinson's disease selected for deep brain stimulation (DBS) of the subthalamic nucleus (STN) in accordance with the criteria established by Welter and colleagues (Welter et al., 2002); * Aged 18 years or above; * Written informed consent from the patient. Exclusion Criteria: * Patient under a legal incapacity or with limited legal capacity; * Patient who has perioperative complications or postoperative confusion; * Patient displaying cognitive disturbances involving the early stages of speech processing (on the basis of an audiogram systematically conducted prior to surgery) ; * Patient displaying cognitive disturbances involving the early stages of face processing (on the basis of the Benton Facial Recognition Test (Benton, Hamsher, Varney, \& Spreen, 1983) systematically administered prior to surgery); * Patient incapable of understanding the information given about the study, performing the tasks or providing informed consent.