The human brain viewed from the bottom. It is the part of the central nervous system that is encased in the skull. It consists of the prosencephalon (forebrain, telencephalon/cerebrum and diencephalon), mesencephalon (midbrain), rhombencephalon (hindbrain, metencephalon and myelencephalon, brain stem).
The illustration also shows the ciclre of willis and the cranial nerves.