Marcelo Salvador GOMES, Gabriel Pinto DİAS, Mauricio Portes SANTOS, Sobrado SILVA, Clarice Machado DOS SANTOS, Marcelo ABİDU-FİGUEİREDO

Circulus arteriosus formation in cat brain

Amaç: Bu çalışmanın amacı, kedide her iki cinsiyete ait circulus arteriosus'u oluşturan yapıların tanımlanmasıdır.Gereç ve Yöntem: Çalışma, burun-sakrum uzunluğu sırası ile 47.9 cm ve 46.6 cm olan 25 erkek ve 25 dişi yetişkin kedi kadavrası üzerinde gerçekleştirildi. Kediler sağ lateral tarafa yatırıldı, torakal ensizyon ile 6. ve 7. torakal kostalar uzaklaştırılarak aortanın torakal bölümü kanüle edildi. Kediler %10 formol solüsyonu ile tespit edilip boyalı latex solüsyonu enjekte edildikten sonra craniumlar açıldı ve beyin diseke edilerek circulus arteriosus'un yapısı tanımlandı.Bulgular: Beyinin tabanında yer alan arterler, arteria carotis ve vertebral-basillar sistemden köken alan ve beyinin arteriel vaskularizasyonundan sorumlu olan arterlerdi. Circulus arteriosus'un rostral bölümünün, arteria communicans rostralis'in varlığı durumunda hayvanların % 46'sında bu arter tarafından kapatıldığı, arka bölümünün ise hayvanların tamamında kapalı olduğu tespit edildi.Öneri: Encephalon'un basal yüzünün kan damarlarının muhtemel varyasyonlarını, dağılımını ve yerleşimini inceleyen çalışmalar, evcil memeli hayvanlarda klinik ve cerrahi yaklaşımların gelişimine katkı sağlayacaktır.

Kedi beyininde circulus arteiosus'un yapısı

Aim: The aim of this study was to describe the formation of the circulus arteriosus of the brain in cats of both sexes.Materials and Methods: Anatomical dissections were performed on 50 cadavers of adult cats, 25 males and 25 females, with a medium rostrum-sacral length of 47.9 cm and 46.6 cm respectively. Cats were positioned in right lateral recumbency and a thoracic incision was performed to remove the 6th and 7th ribs to cannulate the thoracic portion of the aorta. After fixed with a 10% formaldehyde solution and injected with latex solution stained with pigment, the cats went through craniotomy and dissection of the brain to identify the formation of the circulus arteriosus.Results: The arteries of the base of the brain were dependent of the carotid and vertebral-basilar systems, which were responsible for the brain arterial circuit formation. The brain circuit was rostrally closed by the presence of the rostral communicating artery in 46% of the animals and caudally closed in 100%.Conclusions: Studies that clarify the organization, distribution and possible variations of the blood vessels of the encephalon base, certainly will contribute for the advance in the clinical-surgical boarding in domestic animals.

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