cerebellum vermis morphology trait cerebellum vermis cell quantity cerebellum vermis cell number The proportion or number of cells in the narrow medial zone between the two hemispheres of the cerebellum that is delimited by two longitudinal furrows; it may be continuous with the cerebellar hemispheres in some areas of the cerebellum, e.g., dorsally, or separated by deeper fissures in others (e.g., ventrally); it receives inputs from the spinocerebellar tracts which carry to the vermis information on the position and balance of the torso, and it sends projections to the fastigial nucleus of the cerebellum, which then sends output to the vestibular nuclei. Trait.ontology VT:0000866