Arteria cerebri anterior

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Arteria cerebri anterior
Gray517.png
Outer surface of cerebral hemisphere, showing areas supplied by cerebral arteries. (Blue is region supplied by anterior cerebral artery.)
Circle of Willis en.svg
The arterial circle and arteries of the brain. The anterior cerebral arteries (top of figure) arise from the trifurcations of the internal carotid arteries into the anterior cerebral artery, middle cerebral artery and posterior communicating artery on each side.
Latin Arteria cerebri anterior
Gray's subject #146 571
Forsyner cerebrum
Kilde internal carotid artery
MeSH A07.231.114.228.100

I den humane anatomi forsyner Arteria cerebri anterior (ACA) mediale deler av frontallappene og den superiøre mediale del av parietallappen. ACA avgår fra arteria carotis interna og er del av Willis' sirkel.

Venstre og høyre ACA er forbundet med hverandre via arteria cerebri communicans anterior.

Segmenter og forgreninger[rediger | rediger kilde]

ACA inndeles klassifikasjonsmessig i fem segmenter:

  • A1: dette segmentet avgår fra arteria carotis interna og slutter ved arteria cerebri communicans anterior. The anteromedial central (medial lenticulostriate) arteries arise from this segment as well as the AComm, which irrigate the caudate nucleus and the anterior limb of the internal capsule
  • A2: dette segmentet extends from the AComm to the bifurcation forming the pericallosal and callosomarginal arteries. The recurrent artery of Heubner (distal medial striate artery), which irrigate the internal capsule, usually arises at the beginning of this segment near the AComm. 4 branches arise from this segment, the:
    • Orbitofrontal artery (medial frontal basal): Arises first a small distance away from the AComm
    • Frontopolar artery (polar frontal): Arises after the orbitofrontal close to when A2 curves posteriorly over the corpus callosum. Could also originate from the callosal marginal.
  • A3: Also termed the pericallosal artery this is one of (or the only) the main terminal branches of the ACA, which extends posteriorly in the pericallosal sulcus to form the internal parietal arteries (superior, inferior) and the precuneal artery. This artery may from an anastomosis with the posterior cerebral artery.
    • Callosal marginal artery: A commonly present terminal branch of the ACA, which bifurcates from the pericallosal artery. This artery in turn branches into the medial frontal arteries (Anterior, Intermediate, Posterior), and the paracentral artery, with the cingulate branches arising throughout its length. Depending on anatomical variation, the callosal marginal artery may be none discrete or not be visible. In the latter case, the branches mentioned will originate from the pericallosal artery. In a study of 76 hemispheres, the artery was present in only 60% of the cases.[1] Angiography studies cite that the vessel can be see 67%[2] or 50%[3] of the time.

Flere bilder[rediger | rediger kilde]

Referanser[rediger | rediger kilde]

  1. ^ SCHNEIDER, FELIPE L.; MARRONE, ANTONIO C. H.; SEVERINO, ANTONIO G.; JACKOWSKI, ANDREA P.; WALLACE, M. CHRISTOPHER (2000), «Anatomic Variations of Anterior Cerebral Artery Cortical Branches», Clinical Anatomy (13): 321–236 
  2. ^ Siteringsfeil: Ugyldig <ref>-tagg; ingen tekst ble oppgitt for referansen ved navn Kray
  3. ^ Osborn, Anne G.; Jacobs, John M. (1999), Diagnostic Cerebral Angiography, Lippincott Williams & Wilkins, ss. 143–144, ISBN 9780397584048  

Eksterne lenker[rediger | rediger kilde]