the boundary landmark of brain stem in ant surface Midbrain Sup. border of pons Pons bulbopontine sulcus Medulla oblongata Brain stem connect with 3-12 cranial nerves Copy Right- Hongqi ZHANG-Department of Anatomy-Fudan UniversityCopy Right- Hongqi ZHANG-Department of Anatomy-Fudan University Copy Right- Hongqi ZHANG-Department of Anatomy-Fudan University Midbrain Pons Medulla oblongata Sup.border of pons bulbopontine sulcus Brain stem connect with 3-12 cranial nerves the boundary landmark of brain stem in ant. surface