archaeocerebellum

ar·chi·cer·e·bel·lum

(ar'ki-ser'ĕ-bel'ŭm), [TA] The small, phylogenetically oldest portion of the cerebellum, sometimes called the vestibulocerebellum because its afferents arise primarily from the vestibular ganglion and nuclei; in mammals, it is represented by four subdivisions of the cerebellum: nodulus, uvula vermis, flocculus, and lingula of cerebellum. Synonym(s): archaeocerebellum [archi- + L. cerebellum]