NCIt related terms : Structure of vertebral artery (body structure);
NCIt definition : The first branch of the subclavian artery that ascends both sides of the neck and
merges at the middle line to from the basilar artery at the level of the pons.;
Alternative definition : CDISC: The first branch of the subclavian artery that ascends both sides of the neck
and merges at the middle line to form the basilar artery at the level of the pons.;