In the anatomy of the brain of vertebrates, the prosencephalon (or forebrain) is the rostral-most portion of the brain. The prosencephalon, the mesencephalon (midbrain), and rhombencephalon (hindbrain) are the three primary portions of the brain during early development of the central nervous system.

At the five-vesicle stage, the prosencephalon separates into the diencephalon (thalamus, hypothalamus, subthalamus, and epithalamus) and the telencephalon (cerebrum). The cerebrum consists of the cerebral cortex, underlying white matter, and the basal ganglia.

See also

• List of regions in the human brain

Cerebrum | Developmental biology

Prosencephalon | Prosencéphale | Prosencephalon | Prosencephalon