Classic scheme of cortico-basal ganglia connectivity highlighting the main motor, associative-cognitive, and emotional-limbic domains. M1, primary motor cortex; SMA, supplementary motor area; PMC, pre-motor cortex; SNc, substantia nigra pars compacta; GPe, globus pallidus pars externa; STN, subthalamic nucleus; GPi, globus pallidus pars interna; SNr, substantia nigra pars reticulate; VL, ventralis lateralis; VA, ventralis anterior; MD, medio-dorsal.