Fm: Foramen of Magendie; imv: inferior medullary velum; icp: inferior cerebellar peduncle; pica: posterior inferior cerebellar artery (third and forth segments) tc: tela chorioidea; tvj: telovelar junction ( yellow discontinous line).

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.