The aim of the International Meetings of the Basal Ganglia Society (IBAGS) is to provide a unique environment for the open presentation and discussion of new and challenging information about the basal ganglia as it relates to health and disease, covering all areas of basic science and research. Specific topics of the proceedings of this Eighth International Triennial Meeting of the Basal Ganglia Society include behavior, circuitry, functional imaging, modelling, movement disorders, neuropathology, neurotransmitters, pharmacology, physiology, plasticity, treatments for basal ganglia disorders, ventral systems, health and disease, immunology and basal ganglia, and much more.