Persistent limbic arch

Last revised by Frank Gaillard on 25 Nov 2022

Citation, DOI, disclosures and article data

Citation:

Gaillard F, Persistent limbic arch. Reference article, Radiopaedia.org (Accessed on 23 Apr 2024) https://doi.org/10.53347/rID-157059

DOI:

https://doi.org/10.53347/rID-157059

Permalink:

https://radiopaedia.org/articles/157059

rID:

157059

Article created:

24 Nov 2022, Frank Gaillard ◉ ◈

Disclosures:

At the time the article was created Frank Gaillard had the following disclosures:

Radiopaedia Australia Pty Ltd and Radiopaedia Events Pty Ltd, Director, Founder and CEO (Radiopaedia) (ongoing)
Biogen Australia Pty Ltd, Investigator-Initiated Research Grant for CAD software in multiple sclerosis: finished Oct 2021 (past)

These were assessed during peer review and were determined to not be relevant to the changes that were made.

View Frank Gaillard's current disclosures

Last revised:

25 Nov 2022, Frank Gaillard ◉ ◈

Disclosures:

At the time the article was last revised Frank Gaillard had the following disclosures:

Radiopaedia Australia Pty Ltd and Radiopaedia Events Pty Ltd, Director, Founder and CEO (Radiopaedia) (ongoing)
Biogen Australia Pty Ltd, Investigator-Initiated Research Grant for CAD software in multiple sclerosis: finished Oct 2021 (past)

These were assessed during peer review and were determined to not be relevant to the changes that were made.

View Frank Gaillard's current disclosures

Revisions:

1 time, by 1 contributor - see full revision history and disclosures

Systems:

Vascular, Central Nervous System

Synonyms:

Persistent limbic ring

A persistent limbic arch (or ring) is a cerebral vascular anatomical variant whereby a complete vascular ring encircles the limbic system and corpus callosum.

In the embryo, this connection is between the anterior choroidal artery and the anterior cerebral artery (via pericallosal artery) ². This usually regresses and in the adult, the anterior and posterior supply are separated by an intervening pial capillary network on the superior surface of the posterior corpus callosum ^1,2.

Occasionally persistent direct a large-caliber anastomosis is identified in adults, divided into two types ²:

type I: between the pericallosal artery (anterosuperiorly) and the anterior choroidal artery (posteroinferiorly)
type II: between the pericallosal artery (anterosuperiorly) and the splenial artery (posteroinferiorly)

These anastomoses are also important in various disease states including vein of Galen malformations ¹ and moyamoya disease ².