817454.fig.002a
(a)
817454.fig.002b
(b)
Figure 2: The patent FV viewed from the middle cranial fossa (a) and the extracranial view of the skull base (b). CC: carotid canal; CG: carotid groove; FL: foramen lacerum; FO: foramen ovale; FR: foramen rotundum; FS: foramen spinosum; FV: foramen of Vesalius.