Editing Brainstem (section)

===Blood supply===
[[File:Blausen 0114 BrainstemAnatomy.png|thumb|The brainstem receives blood via the [[vertebral artery|vertebral arteries]], shown here.]]
The main supply of blood to the brainstem is provided by the [[basilar artery|basilar arteries]] and the [[vertebral artery|vertebral arteries]].<ref name="Purves" />{{rp|740}} It is important to note that there is a bit of variability in how these arteries connect and supply blood to the brain, such as where the arteries fuse or are reinforced. The variability that exists allows for syndromes to be introduced if certain vessels are excluded from where they should normally be. Syndromes can be in fragments or combinations depending on how the vessels are arranged and if the brain is getting adequate blood supply.<ref>{{Cite web |date=2015-07-21 |title=Brainstem Arteries |url=https://www.umassmed.edu/strokestop/modules/module-3-the-blood-supply-of-the-brain/vertebral-basilar/brainstem-arteries/ |access-date=2024-12-06 |website=UMass Chan Medical School |language=en}}</ref>