We aimed to determine whether our targeting method for the subthalamic nucleus (STN) in Parkinson's disease informs the initial programming sequence. We evaluated 100 STN-lead pairs from 50 patients who underwent bilateral STN-deep brain stimulation operations. All patients had at least one year of follow-up. In each patient, we measured coordinates of the STN borders and determined the center from special T2-weighted MRI. We then measured the postoperative location of the lead tip by MRI registered to preoperative images. Finally, we determined the mode and active contact(s). Programming was monopolar 71% of the time. A total of 52% of left and 72% of right STN active contacts were located posterolateral to the STN center. In z, only 14% of the active contact(s) were >1mm below the STN center. Contacts 1 or 2 were active 90% of the time. The consistent location of active contacts suggests that initial programming began with contact 1 or 2.
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