Left posterior view of cranial nerves converging on the opening of the jugular foramen. A bony or fibrous septum often divides this foramen into a pars nervosa and pars vascularis part. The pars nervosa presents a glossopharyngeal meatus for entry of this nerve. The inferior petrosal sinus also enters this pars and is seen just to the right. The pars vascularis, marked by the vagal meatus, is entered by the vagus and spinal accessory nerves. Near the top of this image are the facial and vestibulocochlear nerves approaching the internal auditory meatus. (Image courtesy of AL Rhoton, Jr.)