The radiology and embryology of anomalous arteries of the head and neck.

Caldemeyer, Karen S.; Carrico, James B.; Mathews, Vincent P.

doi:10.2214/ajr.170.1.9423632

Cited by 80 publications

(72 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…1 The intracranial segmental arteries are named according to the cranial nerves they correspond with (trigeminal, otic, and hypoglossal). 2 When the posterior communicating arteries form, these intracranial carotid-basilar anastomoses regress. There are eight extracranial anastomosing segments.…”

Section: Discussionmentioning

confidence: 99%

Bilateral Type II Persistent Proatlantal Intersegmental Arteries

Pelz

Menon

Swartz

et al. 2013

Can. J. Neurol. Sci.

View full text Add to dashboard Cite

A 64-year-old man with treated hypertension presented with acute left arm and leg weakness. A brain magnetic resonance imaging (MRI) and neck magnetic resonance angiography (MRA) were performed. There was restricted diffusion in the right internal capsule posterior limb consistent with an acute lacunar infarct. The MRA demonstrated aplastic bilateral cervical vertebral arteries (V1 and V2 segments). bilaterally, a variant artery arose from the external carotid just above its origin, extended superiorly then medially, and forming the vertebral artery (V3 and V4 segments). bilaterally, the occipital artery arose from the variant artery at the juncture where it turned medially. The right variant artery terminated intracranially in the right posterior inferior cerebellar artery. The left variant artery continued intracranially to supply the basilar. The appearance was consistent with bilateral persistent proatlantal intersegmental arteries (PPIA) type II.

show abstract

Section: Discussionmentioning

confidence: 99%

Bilateral Type II Persistent Proatlantal Intersegmental Arteries

Pelz

Menon

Swartz

et al. 2013

Can. J. Neurol. Sci.

View full text Add to dashboard Cite

show abstract

“…Carotid-vertebrobasilar anastomoses (primitive trigeminal, otic, hypoglossal and proatlantal intersegmental arteries) are embryonic presegmental arteries supplying the primitive vertebrobasilar system from the primitive ICA [12][13][14][15]. The origin and termination of the right PCoA indicates the most cranial of the embryonic vessels connecting the anterior and posterior cerebral circulations.…”

Section: Discussionmentioning

confidence: 99%

Remnants of embryonic arteries on the brain base: A case report

Vasović¹,

Jovanović²,

Ugrenović³

et al. 2012

WJNS

View full text Add to dashboard Cite

show abstract

“…In addition, during the development of human embryos, there are four other temporary pathways connecting the ICA and the basilar artery: persistent trigeminal artery, persistent hypoglossal artery, proatlantal intersegmental artery, and persistent internal auditory artery. If these pathways are not degraded in adults, it is known as persistent cervicalbasilar artery anastomosis, a rare congenital cerebrovascular variation [12]. The neurosurgeon should pay more attention to the presence of persistent cervical-basilar artery anastomosis to avoid damage to vascular anastomosis, thereby avoiding severe cerebral ischemia or infarction during surgery.…”

Section: Commentarymentioning

confidence: 99%

Arterial Vascular Variation of the Head and Neck and Its Clinical Significance

Shi¹

2017

J Neurol Neurophysiol

View full text Add to dashboard Cite

CommentaryArterial vascular variation of the head and neck is common and is often overlooked because of the lack of obvious clinical symptoms. Variations are generally detected accidentally by head and neck computed tomography angiography (CTA), magnetic resonance angiography (MRA) or ultrasound. Considering the lack of adequate understanding of the presence and location of the arterial vascular variations of the head and neck, vessels are easily injured or incorrectly ligated intraoperatively. Sometimes this could even cause fatal consequences. Therefore, in recent years, increasing attention has been paid to the diagnosis and assessment of arterial vascular variations of the head and neck.As an important part of the brain's blood supply system, there are many types of variations in the vertebral artery. Common variations of vertebral arteries mainly include variations in origin, in number, in the first transverse foramen during the ascending process, and in diameter, amongst others. A variation in origin refers to the origin of a vertebral artery from an artery other than the subclavian artery. A left vertebral artery originating from the aortic arch between the left common carotid artery (CCA) and the left subclavian artery is the most common variation in the origin of the vertebral artery. Although the blood supply is not majorly affected, the vertebral artery blood pressure often increases significantly. This can lead to vertebral artery atherosclerosis, stenosis or obstruction. Increased pressure within the aortic arch further becomes one of the prime reasons for rupture or formation of arterial dissection of the left vertebral artery. A vertebral artery originating from the CCA is rare; however, researchers have found that the aberrant right subclavian artery and origin variation of the right vertebral artery have a certain correlation [1]. A vertebral artery of anomalous origin often leads through the first transverse foramen higher than the normal origin, leading to the initial segment of the vertebral artery being extensive and tortuous and a lack of protection of the cervical transverse process. Rotation of the neck may cause vertebral artery spasms or dissection and even occlusion [2]. The vertebral artery of anomalous origin generally leads through the fifth, the fourth, or even the seventh vertebra other than the sixth vertebra. The neurosurgeon should completely understand and evaluate the presence of vertebral artery variations to avoid damage to the vertebral artery and the blood supply to the spinal cord and brain during surgery. A variation in number of vertebral arteries means unilateral or bilateral absence of vertebral artery or the increase of the number of vertebral arteries. Hypoplasia of vertebral artery is common. Vertebral artery hypoplasia refers to that the diameter of vertebral artery is less than 2.5 mm or the diameter of one side vertebral artery is less than 50% of the contralateral side. But the diagnostic criteria of vertebral artery hypoplasia are not uniform. Chaturvedi et a...

show abstract

The radiology and embryology of anomalous arteries of the head and neck.

Cited by 80 publications

References 0 publications

Bilateral Type II Persistent Proatlantal Intersegmental Arteries

Bilateral Type II Persistent Proatlantal Intersegmental Arteries

Remnants of embryonic arteries on the brain base: A case report

Arterial Vascular Variation of the Head and Neck and Its Clinical Significance

Contact Info

Product

Resources

About