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Definition of Paleocerebellum
1. Noun. The anterior lobe of the cerebellum which was one of the earliest parts of the hindbrain to develop in mammals.
Medical Definition of Paleocerebellum
1. Phylogenetic term referring to the portion of the cerebellum including most of the vermis and the adjacent zones of the cerebellar hemispheres rostral to the primary fissure; paleocerebellum is equated with the anterior lobe and corresponds to the zone of distribution of the spinocerebellar tracts and is sometimes called spinocerebellum; in phylogenetic age, it is thought to be intermediate between the archicerebellum and the neocerebellum. Synonym: spinocerebellum. Origin: paleo-+ L. Cerebellum (05 Mar 2000)