Vertebrobasilar Arteries

Persistent carotid-vertebrobasilar anastomoses

Persistent otic artery

Persistent hypoglossal artery

Persistent acoustic artery

Persistent primitive trigeminal artery ("tau" / "trident" sign)

  • #1 most common persistent artery
  • In utero, the trigeminal artery supplies basilar artery before Pcomm/verts develop
  • persistent primitive trigeminal artery arises from the junction b/w petrous and cavernous ICA, runs posterolaterally along CN V, or crosses over through dorsum sellae
 
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Persistent proatlantal artery