Fig. 1.

Axial T2-weighted MR images. a Medullar/cerebellar cross-section showing fissures (dotted lines) between lobules VII, VIII, and IX. b Mid-pontine/cerebellar cross-section showing a primary fissure (PF, black lines) dividing the cerebellum into anterior and posterior lobes, and separating lobules V and VI. The posterior superior fissure (PSF, white lines) separates lobules VI and VII, and the great horizontal fissure (GHF, white lines) separates lobule VII (crus [Cr] I) from lob ule VII (Cr II). c Rostral pontine/cerebellar cross-section showing lobules I–VII and fissures separating these lobules.