Conceptual models of locomotor control. Arrows show supraspinal connections thought to be the most relevant for automatic and conscious locomotor control, with the most emphasized connections for each type of locomotor control shown in black. Known inhibitory connectivity is shown by dashed lines. MLR, midbrain locomotor region; CLR, cerebellar locomotor region; M1F, primary motor cortex foot area; SMA, supplemental motor area; PMd, dorsal premotor cortex; PPN, pedunculopontine nuclei; CN, cuneiform nuclei; FN, fastigial nuclei; DN, dentate nuclei; Lat Cblm, lateral cerebellum; PMRF, pontomedulary reticular formation; CPGs, central pattern generators