Persistent carotid-vertebrobasilar anastomoses
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The persistent carotid-vertebrobasilar anastomoses are variant anatomical arterial communications between the anterior and posterior circulations due to abnormal embryological development of the vertebrobasilar system. They are named, with the exception of the proatlantal artery, using the cranial nerves with which they run:
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persistent trigeminal artery
- arises from proximal cavernous ICA
- most common persistent carotid-vertebrobasilar anastomosis
- two types - lateral and medial
- Saltzman classification
- type I: absent ipsilateral posterior communicating artery
- type II: fetal origin of ipsilateral posterior communicating artery
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persistent otic (acoustic) artery
- controversial, perhaps non-existent
- arises from petrous ICA
- rare, as it is the first anastomosis to regress
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persistent hypoglossal artery
- arises from cervical ICA at C1 to C3 levels
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persistent proatlantal artery
- type I arises from internal carotid artery
- type II arises from external carotid artery
A mnemonic to help remember these persistent carotid-vertebrobasilar anastomoses is HOT Pepper.
-<p>The <strong>persistent carotid-vertebrobasilar anastomoses</strong> are named, with the exception of the <a href="/articles/proatlantal-artery">proatlantal artery</a>, using the cranial nerves with which they run:</p><ul>- +<p>The <strong>persistent carotid-vertebrobasilar anastomoses</strong> are variant anatomical arterial communications between the anterior and posterior circulations due to abnormal embryological development of the vertebrobasilar system. They are named, with the exception of the <a href="/articles/proatlantal-artery">proatlantal artery</a>, using the cranial nerves with which they run:</p><ul>
-<a title="Proatlantal artery" href="/articles/proatlantal-artery">persistent proatlantal artery</a><ul>- +<a href="/articles/proatlantal-artery">persistent proatlantal artery</a><ul>
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