Cerebellomedullary fissure

The cerebellomedullary fissure (CMF), is the natural cleavage plane between the cerebellum and the medulla oblongata.

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bvl: biventral lobule; cmf: cerebellomedullary fissure Ivv: inferior vermian vein; pci: posterior cerebellar incisura; T: tonsil; V: vallecula; M: medulla.

The telovelar approach is an alternative to cerebellar splitting to gain access to the fourth ventricle through the so-called cerebellomedullary fissure (CMF).

In the telovelar approach, the cerebellomedullary fissure (CMF) is exposed and access to the ventricle is obtained by incising the tela chorioidea and inferior medullary velum. This approach enables the exploration of the entire ventricle cavity from the obex to the aqueduct.

The wide dissection of the cerebellomedullary fissure and gentle tonsils retraction may prevent from the occurrence of cerebellar mutism or other major cerebellar dysfunctions ¹⁾.

see cerebellomedullary fissure approach