[[Tentorial sinus]]es are constant venous channels that have been divided into medial and lateral groups
((Oka K, Rhoton AL Jr, Barry M, Rodriguez R. Microsurgical anatomy of the superficial veins of the cerebrum. Neurosurgery 1985;17:711–748))
((Sakata K, Al-Mefty O, Yamamoto I. Venous consideration in petrosal approach: microsurgical anatomy of the temporal bridging vein. Neurosurgery 2000;47:153–161))
((Rhoton AL. The cerebral veins [suppl]. Neurosurgery 2002;51:S159–S205)).

These sinuses are located on each half of the tentorium. The [[medial tentorial sinus]]es are responsible for the venous drainage of the superior cerebellar surface. The medial tentorial sinuses empty into the [[straight sinus]] and [[transverse sinus]] confluence