Interventions in or around the brainstem. Introduction. Previous . Now the differences with IONM. Let’s start with Cranial Nerves Monitoring. What are the challenges to the Neuro-Surgeon. Compression related displacement of classical anatomical landmarks such as the facial colliculus or the striae medullaris is a common difficulty for neurosurgeons, Even when the anatomy is not … Continue reading Mapping and Monitoring Functional Integrity of the Brainstem.