Numbers represents the percentages of fibers generated from a seed structure that also reached a target structure. Each number was generated from the averages of left seed structure to left target structure and right seed structure to right target structure. Total percentages exceed 100% for each seed structure due to fibers generated from seed structures connecting more than one target structure. Both target and seed structures are GPe, globus pallidus external; GPi, globus pallidus internal; STN, subthalamic nucleus; SNr, substantia nigra reticular; SNc, substantia nigra compact; CP, caudoputamen.