Anterior choroidal artery

The anterior choroidal artery typically originates from the internal carotid artery. It may (rarely) instead arise from the middle cerebral artery.{{Cite book |last=Thomas Lathrop Stedman |url=http://archive.org/details/stedmansmedicald00sted_3 |title=Stedman's medical dictionary. [electronic resource] |date=2006 |publisher=Lippincott Williams & Wilkins |others=Internet Archive |isbn=978-0-683-40007-6}}

It originates from the distal internal carotid artery (ICA) 5 mm distal to the origin of the posterior communicating artery and just proximal to the terminal bifurcation of the ICA.

It initially course posterolaterally on the inferior surface of the cerebral hemisphere alongside the optic tract, crossing the tract medial-to-lateral{{Cite web |title=anterior choroidal artery - Dictionnaire médical de l'Académie de Médecine |url=https://www.academie-medecine.fr/le-dictionnaire/index.php?q=anterior+choroidal+artery |access-date=12 August 2024 |website=www.academie-medecine.fr}} inferior to the tract. At the level of the lateral geniculate nucleus, it curves around the lateral aspect of the cerebral peduncle to reach its posterior aspect. It reaches the medial portion of the transverse cerebral fissure to enter the lateral ventricle. It enters the lateral ventricle at the apex of its inferior horn, at the inferior extremity of choroid fissure, just superior to the uncus.{{Cite book |last=Sinnatamby |first=Chummy S. |title=Last's Anatomy |publisher= |year=2011 |isbn=978-0-7295-3752-0 |edition=12th |pages=473}}

It serves structures in the prosencephalon, diencephalon, and mesencephalon:{{cite book|last=Ropper|first=Maurice Victor, Allan H.|title=Adams and Victor's principles of neurology|year=2001|publisher=Medical Pub. Division, McGraw-Hill|location=New York|isbn=0-07-067497-3|edition=7th|url=https://archive.org/details/adamsvictorsprin00vict}}

• choroid plexus of the lateral ventricle and third ventricle
• optic chiasm and optic tract
• (genu, posterior limb, and retrolentiform part of) internal capsule
• lateral geniculate body
• globus pallidus
• tail of the caudate nucleus
• (tuber cinereum of) hippocampus
• amygdala
• substantia nigra
• red nucleus
• crus cerebri

Occlusion of the artery results in contralateral hemianopsia (partial loss of vision) and hemianaesthesia (loss of sensation), as well as partial hemiplegia (loss of the ability to move). These symptoms are thought to arise from ischemic damage to the posterior limb of the internal capsule, thalamus, and optic chiasm/optic tract. However, the posterior limb of the internal capsule also receives lenticulostriate arteries from the middle cerebral artery, thus creating partially redundant supply.{{cite journal|last=Helgason|first=C|author2=Caplan, LR|title=Anterior choroidal artery-territory infarction: Report of cases and review|journal=Arch. Neurol.|year=1986|volume=43|issue=7|pages=681–686|pmid=3729746|doi=10.1001/archneur.1986.00520070039015}}

{{Anatomy-terms}}

• Plexal point

{{Reflist}}

• {{LoyolaMedEd|Neuro/neurovasc/navigation/achr.htm}}
• {{cite web|url=http://www.tk.de/rochelexikon/pics/s13048.000-1.html |title=Anatomy diagram: 13048.000-1 |work=Roche Lexicon - illustrated navigator |publisher=Elsevier |archive-url=https://web.archive.org/web/20141107120933/http://www.tk.de/rochelexikon/pics/s13048.000-1.html |archive-date=7 November 2014 |url-status=dead }}
• [https://web.archive.org/web/20061215071918/http://www.neuropat.dote.hu/table/erell.htm Blood supply at neuropat.dote.hu]
• http://neuroangio.org/anatomy-and-variants/anterior-choroidal-artery/

{{Arteries of head and neck}}

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Category:Arteries of the head and neck