Figure 1.
Schematic organization of the basal ganglia. Basal ganglia are an ensemble of tightly interconnected sub-cortical nuclei. In blue are represented the glutamatergic (Glu) structures, in red the GABAergic (GABA) nuclei and in yellow the dopaminergic (DA) nucleus. GPe: external part of the globus pallidus; GPi: internal part of the globus pallidus; SNr: substantia nigra pars reticulata; SNc: substantia nigra pars compacta; dp: direct pathway; ip: indirect pathway.