General description of internal structure of brain stem Q Anterior- posterior layout of gray matter in spinal cord; but medial -lateral layout of gray matter in brain stem 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 Anterior - posterior layout of gray matter in spinal cord;but medial - lateral layout of gray matter in brain stem. General description of internal structure of brain stem