From the case: Sagittal midline of the brain: normal anatomy
Normal sagittal midline demonstrating some of the major contours of the brainstem and diencephalon. 1. Body of the fornix 2. Laminae terminalis 3. Columns of the fornix leading into the mammilary bodies. 4. The normal convex border of the midbrain. 5. Tegmentum of the midbrain 6. Tectum of the midbrain.