2012, Cilt 28, Sayı 4, Sayfa(lar) 204-208
Circulus arteriosus formation in cat brain
Marcelo Salvador Gomes1, Gabriel Pinto Dias1, Mauricio Portes Santos Sobrado Silva1, Clarice Machado dos Santos2, Marcelo Abidu-Figueiredo3
1Post graduation student in Veterinary Medicine, Federal Rural University of Rio de Janeiro
2Department of Biomorphology, Federal University of Bahia (UFBA), Salvador, Bahia
3Department of Animal Biology, Federal Rural University of Rio de Janeiro (UFRRJ), Seropedica, Rio de Janeiro, Brazil
Keywords: Irrigation, central nervous system, feline
Abstract
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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