A.cerebri posterior
Transcript of A.cerebri posterior
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Merkezi Sinir Sistemi Damarları
Dr.M.Cudi TUNCERD.Ü.Tıp Fakültesi Anatomi ABD
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Arteria cerebri
• Beyin aşağıdaki arterler tarafından beslenir.– A.carotis interna– A.vertebralis
• Bu arterler spatium subarachnoideum içinde bulunur.– Hipofizin sapı etrafında anastomoz yaparak circulus
arteriosus’u (Willis poligonu) oluştururlar.
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A.carotis interna
• A.cerebri anterior • A.cerebri media
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A.carotis interna’nın bölümleri
• Pars cervicalis• Pars petrosa• Pars cavernosa• Pars cerebralis
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Pars cavernosa’da verdiği dallar• R.ganglionis trigeminalis• R.meningeus anterior• A.ophthalmica• A.cerebri anterior• A.cerebri media
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Pars cerebralis’ten ayrılan dallar• A.communicans posterior• A.choroidea anterior
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Pars cerebralis’ten ayrılan dallar• A.communicans posterior• A.choroidea anterior
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A.vertebralis• Bu arterin intrakranial
bölümünden ayrılan dallar;– Rami meningea– A.spinalis posterior– A.spinalis anterior– A.inferior posterior
cerebelli– Rami medullares
anteriores/posteriores
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A.basilaris• Aa.pontis• A.labyrinthi• A.inferior anterior cerebelli• A.superior cerebelli• A.cerebri posterior
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Circulus arteriosus(Willus poligonu)
• Fossa interpeduncularis• Infundibulum –chiasma opticum• A.corotis interna (2 adet)• A.vertebralis (2 adet)• Bu arter ağında;
– A.communicans anterior– A.cerebri anterior– A.carotis interna– A.communicans posterior– A.cerebri posterior– A.basilaris
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ACA,ACM ve ACP tarafındanbeslenen kortikal alanlar
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A.cerebri media’nın superior ve inferior dalları
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A.cerebri anterior ve posterior
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Capsula interna ve Basal ganglionları besleyen Lenticulostriate arterler
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Basal ganglionlar ve Thalamus’un arteryel beslenmesi
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•Venae cerebri•Venae superficiales cerebri (vv.prefrontales,vv.frontales
vv.parietales,vv.occipitales)•Sinus sagittalis superior-sinus cavernosus
•Venae profunda cerebri•V.magna cerebri
•Sinus rectus
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Medulla spinalis’in arteryel beslenmesi
• A.spinalis anterior (A.vertebralis)– Boyunda: a.vertebralis ve a.cervicalis ascendens– Göğüste: A.intercostalis posterior– Karın ve pelviste: a.lumbalis, a.iliolumbalis ve
a.sacralis lateralis• A.spinalis posterior (A.vertebralis veya
a.inferior posterior cerebelli)
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A.spinalis anterior ve posterior
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A.spinalis anterior
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A.spinalis posterior