MODULE 12
INTRODUCTION
It is important for you to have a general understanding of where the auditory and vestibular divisions of the eighth cranial nerve enter the brainstem. This region, often referred to as the cerebellopontine angle, is a reasonably common site for tumors--usually originating from Schwann cells in the sheath of the vestibular nerve (they're commonly called - in error - acoustic neuromas). Blumenfeld discusses this problem on page 492, and makes it the topic of Case 12.5, starting on page 512. In contrast to the visual system, however, the central course of the auditory and vestibular pathways is of limited clinical significance and difficult to trace on our slides. Therefore, the treatment will be brief.
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