Blood supply of medulla
What is the vascular supply of the medulla?
The medulla is supplied by the vertebral arteries and their branches.
Its blood supply may be further subdivided into two groups, the paramedian bulbar and the lateral bulbar arteries.
The paramedian bulbar arteries are penetrating branches, mainly from the vertebral artery, that supply the midline structures of the medulla.
At the lower medulla, branches from the anterior spinal artery also contribute to this paramedian zone.
The lateral portion of the medulla is supplied by the lateral bulbar branches of the vertebral artery or the posterior inferior cerebellar artery.