Gross anatomy of the mammalian cerebellum

For the lobules of the hemisphere of the mammalian cerebellum both Bolk s (1906) descriptive terms and Larsell s numerals can be used. In Larsell s nomenclature the hemispheral lobules bear de prefix H to the number of the vermal lobule with which they are continuous. 

The cortex in the center of the ansiform lobule, in between folium vermis (lobule VIIA of Larsell) and the hemisphere, usually is interrupted (Figs 97 and 99). This interruption may involve all layers of the cortex, with white matter coming to the surface, or only affect the parallel fibers of the molecular layer. At the level of the paramedian lobule the folial chains of vermis and hemisphere are aligned and the cortex between them usually is continuous. The cortex of the pyramis (Larsell s lobule VIII) 

The (central) cerebellar nuclei and the lateral vestibular nucleus of Deiters receive the axons of the Purkinje cells of the cerebellar cortex and serve as the main output stations of the cerebellum. The vermis and the flocculus also project to other vestibular nuclei, but here the Purkinje cell axons compete with vestibular root fibers, intrinsic and commissural vestibular connections and projections from the medial cerebellar nucleus and, therefore, are not the dominant afferent system. 

The subdivision of the cerebellar nuclei is closely related to the longitudinal, zonal 

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