horizontal fissure TA of cerebellum

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

horizontal fissure that divides the ansiform lobule into its major parts, crus I (superior semilunar lobule) and crus II (inferior semilunar lobule). Synonym(s): fissura horizontalis [TA], great horizontal fissure