The primary fissure is the deep V-shaped groove on the upper surface of the cerebellum that separates the anterior lobe from the posterior lobe.
| Location | Superior surface of the cerebellum, crossing the vermis and hemispheres |
|---|---|
| Parts |
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| Connections |
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| Blood Supply | Superior cerebellar artery |
Marks the division between the anterior (spinocerebellar) and posterior (cerebrocerebellar) lobes.
A key landmark for describing cerebellar lesions, for example anterior lobe atrophy in alcohol misuse.
Shrinkage of the cerebellum in front of the primary fissure, typical of chronic alcohol use.
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