Primary vesicles

Definition

Primary vesicles are the initial three brain regions formed during the early stages of embryonic development in the nervous system. These regions evolve to form all the major components of the adult brain.

Related terms

Neural Tube:

The precursor to the central nervous system that eventually forms into the brain and spinal cord.

Prosencephalon:

Also known as the forebrain, it is one of the primary vesicles that later divides to form structures including the cerebrum and diencephalon.

Rhombencephalon:

Known as the hindbrain, it is another primary vesicle which further develops into structures such as the cerebellum and pons