Here, we will draw the cerebellar nuclei and circuitry. Key structures: folium, cerebellar cortical neurons, deep cerebellar nuclei, cerebellar cortical cell layers: the molecular layer, Purkinje layer, granule layer, subcortical white matter, (stellate and basket cells, Purkinje cell, granule cells, Golgi cells, and unipolar brush cells), fastigial, globose, emboliform, and dentate nuclei, vestibulocerebellum, spinocerebellum, pontocerebellum, cerebellar afferent fibers: climbing fibers, mossy fibers (olivocerebellar fibers, inferior olive, triangle of Guillain and Mollaret), and multilayered fibers (monoaminergic fibers, locus ceruleus, raphe nucleus, and the tuberomammillary nucleus of the hypothalamus - noradrenergic, serotinergic, histaminergic), lateral vestibular nucleus.