General introduction of the telencephalon From the development of forebrain vesicle, Younger but with important function Situated at the sup. extremity of the brain Formation of many sulci and gyri because of different growth speed of brain Sulci and gyri increase the surface area of cortex 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 General introduction of the telencephalon From the development of forebrain vesicle, Younger but with important function. Situated at the sup.extremity of the brain Formation of many sulci and gyri because of different growth speed of brain. Sulci and gyri increase the surface area of cortex