View of the right cerebellopontine angle. For orientation, the right border of the image is rostral, the left border is caudal. The facial (CNVII) and vestibulocochlear (CNVIII) nerves exit the brainstem at the cerebellopontine angle and proceed into the internal acoustic canal. Here, the facial nerve is typically anterior and superior relative to the vestibulocochlear nerve. In this image, the anterior inferior cerebellar artery (AICA) lies adjacent to the VII-VIII complex near the internal acoustic canal. (Image courtesy of AL Rhoton, Jr.)