__This program is designed for teaching the anatomy of the posterior skull base. It is specifically oriented to transaxial CT images of this region. The anatomy is presented in two different ways. The first identifies the bones of the posterior skull base as well as their boundaries. The second uses large, easily identifiable features to locate important anatomic structures. One of the most prominent features in this regard is the petro-occipital fissure, a large gap between the medial border of the petrous temporal bone and the lateral border of the clivus. The petro-occipital fissure can be used to "navigate" the skull base since it lies in close proximity to several important foramina, sutures, and canals.
__Images in this module are 2.5 mm sections of a routine CT scan of the head using a high resolution reconstruction algorithm and bone windows.