Primary fissure of cerebellum

{{short description|Groove in the top of the cerebellum}}

{{Infobox brain

| Name = Primary fissure of cerebellum

| Latin = fissura prima

| Image = Gray702 primary fissure of cerebellum.png

| Caption = Upper surface of the cerebellum. (Preclival fissure coloured in red.)

| Image2 = 1613 Major Regions of the Cerebellum-02.svg

| Caption2 = The primary fissure demarcates the anterior lobe {{Legend inline|#a4469a}} and the posterior lobe {{Legend inline|#a9d049}}.

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}}

The monticulus of the cerebellum is divided by the primary fissure (or preclival fissure) into an anterior, raised part, the culmen or summit, and a posterior sloped part, the clivus; the quadrangular lobule is similarly divided.