Microsurgical Anatomy and Surgical Procedures for the Tentorial Incisura

Abstract

  The tentorial incisura can be defined as the space surrounded by the free edge of the cerebellar tentorium. It provides the only communication between the supratentorial and infratentorial spaces, and contains many vital structures such as the components comprising the circle of Willis, cranial nerves, and deep venous systems. Surgery of the tentorial incisura requires correct knowledge of the normal anatomy, and furthermore, variations of the deep venous system should also be well recognized.