Definition : The artery formed by the union of the right and left vertebral arteries; it runs from
the lower to the upper border of the pons, where it bifurcates into the two posterior
cerebral arteries. [MeSH];
The artery formed by the union of the right and left vertebral arteries; it runs from
the lower to the upper border of the pons, where it bifurcates into the two posterior
cerebral arteries. [MeSH]