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      Anatomic study of the arterial vascularization of the brain base of paca (Cuniculus paca) Translated title: Estudo anatômico da vascularização arterial da base do encéfalo da paca (Cuniculus paca)

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          Abstract

          ABSTRACT: Paca (Cuniculus paca Linnaeus, 1766), rodent belong to the Cuniculidae family, has encouraged numerous scientific researches and for this reason could be an experimental model in both human and veterinary areas. And recently, the economic exploitation of the meat cuts, has being direct implication in its zootechnical importance. However, no anatomical descriptions regarding the vascularization of the base of the brain in this rodent has being found. Thus, the aim of the present study was to describe the arteries and the pattern of the vasculature and to compare it with the other species already established in the literature. For this, five pacas, donated by the Unesp Jaboticabal Wildlife Sector, were euthanized followed by the vascular arterial system was injected with red-stained-centrifuged latex by the common carotid artery. After craniectomy, the brains were removed and the arteries were identified and, in addition, compared with those described in other animal species. The presence of the right and left vertebral arteries, close to the medulla oblongata, was detected, originating the basilar artery, which divided into the terminal branches of the right and left basilar artery. Ventral to the optic tract there was the right internal carotid artery and the left, dividing the middle cerebral artery and left rostral and right; dorsal to the optic chiasm, the medial branch of the rostral cerebral arteries was identified. Based on the results, it is concluded that the vascularization of the paca brain base is supplied by the carotid and vertebrobasilar system.

          Translated abstract

          RESUMO: A paca (Cuniculus paca Linnaeus 1766), roedor da família Cuniculidae, tem encorajado inúmeras pesquisas científicas, tornando-a modelo experimental tanto na área humana quanto na veterinária, além da recente exploração econômica de seus cortes cárneos, que favoreceu diretamente sua importância zootécnica. No entanto, não há até o momento, descrições anatômicas referentes à padronização da vascularização da base do encéfalo neste roedor. Assim, o objetivo do presente trabalho foi realizar tal delineamento arterial nessa região do sistema nervoso central e compará-lo com as demais espécies já estabelecidas na literatura. Para isso, foram eutanasiadas cinco pacas doadas pelo setor de Animais Silvestres da Unesp Jaboticabal, as quais foram submetidas posteriormente à injeção de látex centrifugado e corante líquido xadrez vermelho, pela artéria carótida comum. Após craniectomia e segregação do encéfalo de todos os cadáveres, realizou-se a identificação das artérias presentes na base deste órgão e, ademais, comparação destas com as descritas cientificamente em outras espécies animais. Detectou-se a presença das artérias vertebral direita e esquerda, próximas à medula oblonga, originando a artéria basilar, que se dividiu nos ramos terminais da artéria basilar direito e esquerdo. Ventral ao trato óptico verificou-se a artéria carótida interna direita e esquerda dividindo-se na artéria cerebral média e rostral direita e esquerda; ainda, dorsal ao quiasma óptico, identificou-se o ramo medial das artérias cerebrais rostrais. Com base nos resultados obtidos, conclui-se que a vascularização da base do encéfalo da paca é suprida pelo sistema carotídeo e vertebro-basilar.

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          Most cited references28

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          Comparison of diets of the acouchy, agouti and paca, the three largest terrestrial rodents of French Guianan forests

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            The contribution of the stapedial artery to the cephalic arterial supply in muroid rodents.

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              Nomina Anatomica Veterinaria

              (2017)
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                Author and article information

                Journal
                pvb
                Pesquisa Veterinária Brasileira
                Pesq. Vet. Bras.
                Colégio Brasileiro de Patologia Animal - CBPA (Rio de Janeiro, RJ, Brazil )
                0100-736X
                1678-5150
                September 2020
                : 40
                : 9
                : 733-737
                Affiliations
                [3] Franca São Paulo orgnameUniversidade de Franca Brazil
                [5] Maringá PR orgnameCentro Universitário Ingá Brazil
                [4] Jaboticabal SP orgnameFaculdade de Ciências Agrárias e Veterinárias Brazil
                [2] São Paulo São Paulo orgnameUniversidade de São Paulo orgdiv1Faculdade de Medicina Veterinária e Zootecnia Brazil
                Article
                S0100-736X2020000900733 S0100-736X(20)04000900733
                10.1590/1678-5150-pvb-6513
                caf173ea-07f7-487e-b24f-1c18c5425eb8

                This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

                History
                : 28 May 2020
                : 27 April 2020
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 28, Pages: 5
                Product

                SciELO Brazil

                Self URI: Full text available only in PDF format (EN)
                Categories
                Animal Morphophysiology

                Cuniculus paca anatomia,rodent,morphology,brain base,circuito arterioso,paca,Anatomy,central nervous system,brain,Anatomia,base do encéfalo,morfologia,vascularização arterial,sistema nervoso central,arterial vascularization,anatomy,roedor,cérebro,Cuniculus paca,arterial circuity

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