horizontal fissure of cerebellum


hor·i·zon·tal fis·sure of cer·e·bel·lum

(hōr'i-zon'tăl fish'ŭr ser'ĕ-bel'ŭm) Horizontal fissure that divides the ansiform lobule into its major parts, crus I (superior semilunar lobule) and crus II (inferior semilunar lobule).