Artérias colaterais do arco aórtico do gerbil (Meriones unguiculatus) / Collateral arteries of the aortic arch in mongolian gerbil (meriones unguiculatus)

Background: Gerbils (Meriones unguiculatus) are rodents belonging to the Muridae family. Recently, breeding of this species as pets has increased significantly. Animal models are being investigated to study diseases related to the human aortic arch. Despite the importance of the aortic arch in maintaining homeostasis, there is limited data available regarding its morphology in gerbils. This study was performed with the objective of describing the collateral branches of the aortic arch in this animal to establish a standard model and thus contribute to future research on cardiovascular diseases in humans.Materials, Methods & Results: This study used 20 male specimens from previous studies that were frozen and stored at the Laboratory of Veterinary Anatomy of the Federal Rural University of the Semi-Arid Region. After thawing the animals, the thoracic cavity was opened for aortic cannulation. The vascular system was washed using saline solution and Neoprene latex stained with red pigment was injected. Subsequently, the animals were fixed in 10% formaldehyde and were dissected and analyzed 72 h later. The arrangement of the collateral branches of the aortic arch in gerbils was analyzed in all animals. The brachiocephalic trunk, the left common carotid, and the left subclavian artery were observed to originate as collateral branches. The brachiocephalic trunk bifurcated into the right common carotid and the right subclavian arteries. The right and the left subclavian arteries branched into the vertebral artery, the internal thoracic artery, the superficial cervical artery, the costocervical trunk, and the axillary artery.[...](AU)

Artérias colaterais do arco aórtico do gerbil (Meriones unguiculatus) / Collateral arteries of the aortic arch in mongolian gerbil (meriones unguiculatus)

Background: Gerbils (Meriones unguiculatus) are rodents belonging to the Muridae family. Recently, breeding of this species as pets has increased significantly. Animal models are being investigated to study diseases related to the human aortic arch. Despite the importance of the aortic arch in maintaining homeostasis, there is limited data available regarding its morphology in gerbils. This study was performed with the objective of describing the collateral branches of the aortic arch in this animal to establish a standard model and thus contribute to future research on cardiovascular diseases in humans.Materials, Methods & Results: This study used 20 male specimens from previous studies that were frozen and stored at the Laboratory of Veterinary Anatomy of the Federal Rural University of the Semi-Arid Region. After thawing the animals, the thoracic cavity was opened for aortic cannulation. The vascular system was washed using saline solution and Neoprene latex stained with red pigment was injected. Subsequently, the animals were fixed in 10% formaldehyde and were dissected and analyzed 72 h later. The arrangement of the collateral branches of the aortic arch in gerbils was analyzed in all animals. The brachiocephalic trunk, the left common carotid, and the left subclavian artery were observed to originate as collateral branches. The brachiocephalic trunk bifurcated into the right common carotid and the right subclavian arteries. The right and the left subclavian arteries branched into the vertebral artery, the internal thoracic artery, the superficial cervical artery, the costocervical trunk, and the axillary artery.[...]

Vascularização arterial da base do encéfalo de preá (Galea spixii) / Arterial vascularization of the base of the brain in galea (Galea spixii)

Background: Galea (Galea spixii) are rodents which are especially distributed in the northeastern region of Brazil, and have economic importance as their meat is used as a source of protein by the regional population. Currently, they have received attention from researchers in studies involving their morphology. Thus, seeking to contribute information that supports their sanitary management in addition to the lack of literature on their nervous system, our objective was to describe the arterial vascularization of the base of the brain in this species, in order to identify the arterial pattern and arterial circuit behavior, as well as possible variations in these vessels. Materials, Methods & Results: Brains were obtained from 20 animals (10 males and 10 females) aged between 11 and 12 months, obtained from the Wild Animal Multiplication Center (CEMAS) of the Federal Rural Semi-Arid University (UFERSA), under the approval of CEUA/UFERSA (case number 23.091.000653/2014-26 and opinion number 15/2014), euthanized according to anesthetic protocol recommended for rodents (resolution number 714/2002 of the CFMV/ UFERSA) and preserved frozen in a freezer for an average period of 30 days. The animals were thawed and a longitudinal incision was performed in the thoracic region to allow exposure of the aortic arch. Next, they were cannulated in the cranial direction and injected with Noprene Latex “650” stained with water-based white or red pigment. The animals were subsequently fixed in 3.7% aqueous formaldehyde solution for 48 h, and soon after the brain skull cap was dissected and removed, which was then analyzed, photographed and sketched. Of the 20 animals evaluated, 100% presented vertebrobasilar system responsible for encephalic irrigation of the rostral and caudal regions, and anastomosis of the left internal carotid artery was found in only […]

Vascularização arterial da base do encéfalo de preá (Galea spixii) / Arterial vascularization of the base of the brain in galea (Galea spixii)

Background: Galea (Galea spixii) are rodents which are especially distributed in the northeastern region of Brazil, and have economic importance as their meat is used as a source of protein by the regional population. Currently, they have received attention from researchers in studies involving their morphology. Thus, seeking to contribute information that supports their sanitary management in addition to the lack of literature on their nervous system, our objective was to describe the arterial vascularization of the base of the brain in this species, in order to identify the arterial pattern and arterial circuit behavior, as well as possible variations in these vessels. Materials, Methods & Results: Brains were obtained from 20 animals (10 males and 10 females) aged between 11 and 12 months, obtained from the Wild Animal Multiplication Center (CEMAS) of the Federal Rural Semi-Arid University (UFERSA), under the approval of CEUA/UFERSA (case number 23.091.000653/2014-26 and opinion number 15/2014), euthanized according to anesthetic protocol recommended for rodents (resolution number 714/2002 of the CFMV/ UFERSA) and preserved frozen in a freezer for an average period of 30 days. The animals were thawed and a longitudinal incision was performed in the thoracic region to allow exposure of the aortic arch. Next, they were cannulated in the cranial direction and injected with Noprene Latex “650” stained with water-based white or red pigment. The animals were subsequently fixed in 3.7% aqueous formaldehyde solution for 48 h, and soon after the brain skull cap was dissected and removed, which was then analyzed, photographed and sketched. Of the 20 animals evaluated, 100% presented vertebrobasilar system responsible for encephalic irrigation of the rostral and caudal regions, and anastomosis of the left internal carotid artery was found in only […](AU)

Origem e distribuição da artéria celíaca em preás (Galea spixii Wagler, 1831) / Origin and distribution of the celiac artery in yellow-toothed cavies (Galea spixii Wagler, 1831)

Para o estudo foram utilizados 20 animais, que estavam em freezer no Centro de Multiplicação de Animais Silvestres (CEMAS/UFERSA). Os animais foram descongelados, a cavidade abdominal aberta e a aorta torácica canulada no sentido caudal para injeção de solução de látex Neoprene 650 corado de vermelho e, em seguida, fixados em solução de formaldeído a 10%, por um período mínimo de 48 horas, para que pudessem ser dissecados, fotografados e os resultados analisados. A artéria celíaca originou-se da aorta abdominal e emitiu as artérias gástrica esquerda, lienal e esplênica. A artéria gástrica esquerda emitiu de dois a três ramos à região da curvatura menor do estômago. A artéria lienal emitiu quatro ramos ao parênquima do baço, de seis a doze ramos pancreáticos e a artéria gastroepiplóica esquerda. A artéria hepática emitiu de um a dois ramos pancreáticos e bifurcou-se em um curto tronco formado pelas artérias gástrica direita e hepática própria e ainda na artéria gastroduodenal, que originava a pancreaticoduodenal cranial e gastroepiplóica direita. O comportamento de trifurcação da artéria celíaca do preá assemelha-se ao encontrado em roedores, como o nutria, a cutia, o hamster e os ratos, o que sugere que este seja o padrão para a ordem.

For this study we used 20 animals that were in the freezer at the Wild Animals Multiplication Center (CEMAS/UFERSA). The animals were thawed, the abdominal cavity was opened, and the thoracic aorta cannulated caudally for the injection of red-stained latex Neoprene 650, and then fixed in formaldehyde solution 10%, for a minimum of 48 hours. Then the animals were dissected, photographed, and the results analyzed. The celiac artery originated from the abdominal aorta and issued the left gastric, splenic, and hepatic arteries. The left gastric artery issued two to three branches to the lesser curvature of the stomach. The splenic artery emitted four branches to the parenchyma of the spleen, six to twelve pancreatic branches and the left gastroepiploic artery. The hepatic artery emitted from one to two pancreatic branches and forked in a short trunk formed by right gastric and own hepatic arteries and in the gastroduodenal artery, which originated the cranial pancreaticoduodenal and right gastroepiploic. The trifurcation behavior of the celiac artery of the yellow-toothed cavy is similar to that found in rodents such as nutria, agouti, hamsters and mice, suggesting that this is the standard for the order.

Origem e distribuição da artéria celíaca em preás (Galea spixii Wagler, 1831) / Origin and distribution of the celiac artery in yellow-toothed cavies (Galea spixii Wagler, 1831)

Para o estudo foram utilizados 20 animais, que estavam em freezer no Centro de Multiplicação de Animais Silvestres (CEMAS/UFERSA). Os animais foram descongelados, a cavidade abdominal aberta e a aorta torácica canulada no sentido caudal para injeção de solução de látex Neoprene 650 corado de vermelho e, em seguida, fixados em solução de formaldeído a 10%, por um período mínimo de 48 horas, para que pudessem ser dissecados, fotografados e os resultados analisados. A artéria celíaca originou-se da aorta abdominal e emitiu as artérias gástrica esquerda, lienal e esplênica. A artéria gástrica esquerda emitiu de dois a três ramos à região da curvatura menor do estômago. A artéria lienal emitiu quatro ramos ao parênquima do baço, de seis a doze ramos pancreáticos e a artéria gastroepiplóica esquerda. A artéria hepática emitiu de um a dois ramos pancreáticos e bifurcou-se em um curto tronco formado pelas artérias gástrica direita e hepática própria e ainda na artéria gastroduodenal, que originava a pancreaticoduodenal cranial e gastroepiplóica direita. O comportamento de trifurcação da artéria celíaca do preá assemelha-se ao encontrado em roedores, como o nutria, a cutia, o hamster e os ratos, o que sugere que este seja o padrão para a ordem.(AU)

For this study we used 20 animals that were in the freezer at the Wild Animals Multiplication Center (CEMAS/UFERSA). The animals were thawed, the abdominal cavity was opened, and the thoracic aorta cannulated caudally for the injection of red-stained latex Neoprene 650, and then fixed in formaldehyde solution 10%, for a minimum of 48 hours. Then the animals were dissected, photographed, and the results analyzed. The celiac artery originated from the abdominal aorta and issued the left gastric, splenic, and hepatic arteries. The left gastric artery issued two to three branches to the lesser curvature of the stomach. The splenic artery emitted four branches to the parenchyma of the spleen, six to twelve pancreatic branches and the left gastroepiploic artery. The hepatic artery emitted from one to two pancreatic branches and forked in a short trunk formed by right gastric and own hepatic arteries and in the gastroduodenal artery, which originated the cranial pancreaticoduodenal and right gastroepiploic. The trifurcation behavior of the celiac artery of the yellow-toothed cavy is similar to that found in rodents such as nutria, agouti, hamsters and mice, suggesting that this is the standard for the order.(AU)

ORIGEM E DISTRIBUIÇÃO DA ARTÉRIA CELÍACA EM PREÁS (Galea spixii Wagler, 1831)

Abstract For this study we used 20 animals that were in the freezer at the Wild Animals Multiplication Center (CEMAS/UFERSA). The animals were thawed, the abdominal cavity was opened, and the thoracic aorta cannulated caudally for the injection of red-stained latex Neoprene 650, and then fixed in formaldehyde solution 10%, for a minimum of 48 hours. Then the animals were dissected, photographed, and the results analyzed. The celiac artery originated from the abdominal aorta and issued the left gastric, splenic, and hepatic arteries. The left gastric artery issued two to three branches to the lesser curvature of the stomach. The splenic artery emitted four branches to the parenchyma of the spleen, six to twelve pancreatic branches and the left gastroepiploic artery. The hepatic artery emitted from one to two pancreatic branches and forked in a short trunk formed by right gastric and own hepatic arteries and in the gastroduodenal artery, which originated the cranial pancreaticoduodenal and right gastroepiploic. The trifurcation behavior of the celiac artery of the yellow-toothed cavy is similar to that found in rodents such as nutria, agouti, hamsters and mice, suggesting that this is the standard for the order.

Resumo Para o estudo foram utilizados 20 animais, que estavam em freezer no Centro de Multiplicação de Animais Silvestres (CEMAS/UFERSA). Os animais foram descongelados, a cavidade abdominal aberta e a aorta torácica canulada no sentido caudal para injeção de solução de látex Neoprene 650 corado de vermelho e, em seguida, fixados em solução de formaldeído a 10%, por um período mínimo de 48 horas, para que pudessem ser dissecados, fotografados e os resultados analisados. A artéria celíaca originou-se da aorta abdominal e emitiu as artérias gástrica esquerda, lienal e esplênica. A artéria gástrica esquerda emitiu de dois a três ramos à região da curvatura menor do estômago. A artéria lienal emitiu quatro ramos ao parênquima do baço, de seis a doze ramos pancreáticos e a artéria gastroepiplóica esquerda. A artéria hepática emitiu de um a dois ramos pancreáticos e bifurcou-se em um curto tronco formado pelas artérias gástrica direita e hepática própria e ainda na artéria gastroduodenal, que originava a pancreaticoduodenal cranial e gastroepiplóica direita. O comportamento de trifurcação da artéria celíaca do preá assemelha-se ao encontrado em roedores, como o nutria, a cutia, o hamster e os ratos, o que sugere que este seja o padrão para a ordem.

Vascularização arterial da base do encéfalo do gerbil (Meriones unguiculatus Milne-Edwards, 1867) / Arterial vascularization of the base of the cerebrum of mongolian gerbils(Meriones unguiculatus Milne-Edwards, 1867)

Objetivou-se descrever e sistematizar as artérias da base do encéfalo. Foram utilizados dez gerbils que se encontravamarmazenados em freezer no laboratório de Morfofisiologia Animal Aplicada da Universidade Federal Rural do Semiárido. Osanimais foram descongelados, incisados na linha mediana para identificação do ventrículo esquerdo, o qual foi perfurado einjetados 3ml de Látex Neoprene 650 na concentração de 20% e no pigmento vermelho. Posteriormente aguardou-se cerca de 1minuto em virtude da polimerização do Látex e logo após foram fixados por imersão em solução aquosa de Formaldeído a 3,7% eapós 72 horas, tiveram os encéfalos removidos da calota craniana para análise de sua superfície ventral. Foi visto que o sistemavertebrobasilar e carótico estiveram presentes em todos os animais analisados, mostrando-se responsável pela vascularizaçãodo encéfalo caudal e rostral, respectivamente. As principais artérias observadas no modelo padrão incluem as ímpares: basilar,espinhal ventral, ramo medial da artéria cerebral rostral e as pares: vertebral, cerebelar caudal, cerebelar média, trigeminal,cerebelar rostral, ramo terminal da basilar, carótida interna, cerebral caudal, hipofisária, cerebral média, cerebral rostral, lateral dobulbo olfatório e etmoidal interna. Conclui-se com base nos resultados que a irrigação da superfície ventral encefálica do gerbilfoi suprida pelos sistemas vertebro-basilar e carótico de forma equivalente, pertencendo assim ao modelo do tipo II. O circuitoarterioso apresentou-se aberto caudalmente e fechado rostralmente, fato que difere do relatado em roedores como capivara,cutia, preá, chinchila e nutria.(AU)

The objective was to describe and systematize the arteries of the base of the brain. Ten gerbils were used, which were stored in afreezer in the Laboratory of Applied Animal Morphophysiology of the Federal Rural Semi-Arid University. The animals were thawed,incised in the midline to identify the left ventricle, which was punctured and injected 3 ml of Latex Neoprene 650 at a concentrationof 20% and red pigment. After about one minute the polymerization of the Latex was delayed and afterwards fixed by immersionin 3.7% aqueous Formaldehyde solution and after 72 hours the brain was removed from the skull cap for analysis of its ventralsurface. It was observed that the vertebro-basilar and carotid system were present in all animals analyzed, being responsible forthe vascularization of the caudal and rostral encephalon, respectively. The main arteries observed in the standard model includethe odd: basilar, ventral spinal, medial branch of the rostral cerebral artery and, the pairs: vertebral, cerebellar caudal, cerebellarmedial, trigeminal, cerebellar rostral, terminal branch of the basilar, internal carotid, caudal cerebral, Pituitary, middle cerebral, rostral,lateral, olfactory and internal ethmoidal. Based on the results, the irrigation of the ventral brain surface of the gerbil was suppliedby the vertebro-basilar and carotic systems in an equivalent way, thus belonging to the type II model. The arterial circuit was opencaudally and closed rostrally, a fact that differs from that reported in rodents such as capybara, agouti, cavy, chinchilla and nutria.(AU)

Origen y distribución del nervio ciático en ovejas Morada Nova / Origin and distribution of the sciatic nerve in Morada Nova sheep / Origem e distribuição do nervo isquiático de ovinos da raça Morada Nova

El nervio ciático es el nervio más grande del cuerpo que pertenece a ambos el plexo sacro como el lumbosacra, y hay pocos estudios en la literatura con respecto a la anatomía de este nervio en los pequeños rumiantes. Sabiendo que este nervio es vulnerable a varias lesiones a lo largo de su trayectoria y la carne de la extremidad pélvica es de alto valor comercial, este estudio tuvo como objetivo comprender la formación del nervio ciático y sus territorios de inervación en ovejas Morada Nova. El experimento se llevó a cabo en el Laboratorio de Anatomía de la Universidad Federal Rural de la Zona Semiárida, siendo utilizados 20 medias carcaças derechas de ovino, machos de la raza nueva dirección, con edades comprendidas entre los 6 y 7 meses de edad procedentes de la granja experimental EMPARN-RN. Las carcasas fueron disecadas para ver el nervio ciático, y las piezas almacenadas en cámara fria. Después de diseccionado se examinaron con el ojo desnudo, la variación fue encontrado en la cantidad de las vértebras lumbares y sacras de ovejas, que osciló entre 7 vértebras lumbares y 3 sacrales (90%) y 6 lumbares y cuarto sacrales (10%), cambiando asi el origen del nervio. El nervio ciático se formó por las raíces ventral L7S1S2 (75%) de L6S1S2 (10%) de L7S1S2S3 (10%) y las ramas ventrales S1S2S3 (5%), la distribución de los músculos gluteobiceps, y semimembranoso músculo semitendinoso [...]

The sciatic nerve is the largest nerve in the body, belonging both to the sacral plexus as the lumbosacral, and there are few studies in the literature relating to anatomy of this nerve in small ruminants. Knowing that this nerve is vulnerable to several injuries along its path and that the flesh of the pelvic limb is of high commercial value, this study aimed to understand the formation of the sciatic nerve and its innervation territories in Morada Nova sheep. The experiment was conducted at the Anatomy Laboratory of the Federal Rural University of the Semi-Arid, being rights socks used 20 carcasses heep, of the new address race, aged between 6 and 7 months of age coming from Experimental Farm EMPARN-RN. The carcasses were dissected in order to view the sciatic nerve, and the pieces kept in cold storage. After dissected and examined with the naked eye, it was observed variations in the quantity of the lumbar and sacral vertebrae of sheep, which ranged between 7 and 3 sacral lumbar vertebrae (90%) and 6 lumbar and sacral 4 (10%), changing the origin of the nerve. The sciatic nerve was formed by ventral roots L7S1S2 (75%) of L6S1S2 (10%) of L7S1S2S3 (10%) and ventral branches S1S2S3 (5%), distributing the gluteobiceps muscles, semimembranosus muscle and the semitendinosus and may also innervate the quadriceps muscle of the thigh. The knowledge of these anatomical features can [...]

O nervo isquiático é o maior nervo do corpo pertencendo tanto ao plexo sacral quanto ao lombossacro, sendo raras as citações na literatura referentes à anatomia deste nervo em pequenos ruminantes. Sabendo que este nervo é vulnerável a diversas lesões ao longo de seu trajeto e que a carne do membro pélvico é de alto valor comercial, este trabalho teve como objetivo conhecer a formação do nervo isquiático, bem como seus territórios de inervação em ovinos Morada Nova. O experimento foi conduzido no Laboratório de Anatomia da Universidade Federal Rural do Semi-Árido, sendo utilizadas 20 meias carcaças direitas de ovinos, machos da raça morada nova, com faixa etária entre 6 e 7 meses de idade procedentes da Fazenda Experimental da EMPARN-RN. As carcaças foram dissecadas de modo a visualizar o nervo isquiático e as peças conservadas em câmara fria. Após dissecadas e analisadas a olho nu, verificou-se variações na quantidade de vértebras lombares e sacrais do ovino, que variaram entre 7 vértebras lombares e 3 sacrais (90%) e 6 lombares e 4 sacrais (10%), alterando a origem do nervo. O nervo isquiático foi formado por raízes ventrais de L7S1S2 (75%), de L6S1S2 (10%), de L7S1S2S3 (10%) e por ramos ventrais de S1S2S3 (5%), distribuindo-se pelos músculos glúteobíceps, semitendinoso e músculo semimembranoso, podendo também inervar o músculo quadríceps da coxa. O conhecimento destas [...]

Arterial vascularization of the brain of the agouti (Dasyprocta aguti Linnaeus, 1766) / Vascularização arterial da base do encéfalo de cutias (Dasyprocta aguti Linnaeus, 1766)

The agouti, a rodent that is geographically distributed throughout South America, is greatly valued for its meat. This paper describes the arterial vascularization of the base of the agoutis brain, characterizing behavior, and arterial origin and distribution. Ten animals from the Center for the Multiplication of Wild Animals (CEMAS/UFERSA) were used and the study was approved by SISBIO (report number 32413-1) and the Ethics Committee on Animal Use (CEUA/UFERSA) (protocol 02/2010). After euthanasia, the animals were incised in the thoracic cavity by an injection of red-stained Neoprene latex 650 and the skulls were subsequently opened. The brains were extracted from the skulls for ventral surface analysis and then fixed in an aqueous 10% formaldehyde solution. The agoutis arterial vascularization of the brain has two main components, namely the carotid and vertebrobasilar systems. The agoutis carotid system accounts for vascularization of almost the entire forebrain, while the vertebrobasilar system accounts for vascularization of almost the entire posterior brain (medulla oblongata, pyramid, trapezoid body, cerebellum, bridge, and part of the third caudal section of the forebrain) through the caudal cerebral arteries originating from the terminal branches of the basilar artery. The main arteries on the brain surface include the basilar artery, which is unique, and the arterial pairs, specifically the vertebral arteries, cerebellar caudal arteries, trigeminal artery, rostral cerebellar artery, basilar terminal branch artery, cerebral caudal artery, communicating caudal branch of the cerebral carotid artery, cerebral carotid artery, communicating branch rostral cerebral carotid artery, choroidal rostral artery, medial branch of the communicating branch rostral artery, internal ophthalmic artery, middle cerebral artery, and rostral cerebral artery.(AU)

A cutia é um roedor, que se distribui geograficamente por quase toda América Latina, sendo apreciada pelo sabor da sua carne. Neste trabalho objetivou-se descrever a vascularização arterial da base do encéfalo de cutias, caracterizando o comportamento, origem e distribuição das artérias componentes. Foram utilizados 10 animais do Centro de Multiplicação de Animais Silvestres (CEMAS/UFERSA), pesquisa aprovada pela Comissão de Ética no Uso de Animais (CEUA/ UFERSA- n° 02/2010) e pelo SISBIO (N°32413-1). Após eutanásia, os animais foram incisados na cavidade torácica para injeção de Neoprene látex 650 corado na cor vermelha e posterior abertura da calota craniana. Os encéfalos foram extraídos do crânio para análise da sua face ventral e logo fixados em solução aquosa de formaldeído a 10%. A vascularização arterial do encéfalo da cutia apresenta dois componentes principais, o sistema carótico e o vértebro-basilar. O sistema carótico na cutia é responsável pela vascularização do cérebro anterior em quase sua totalidade. O sistema vértebro-basilar é responsável pela vascularização do cérebro posterior (medula oblonga, pirâmide, corpo trapezóide, o cerebelo e ponte e parte do terço caudal do cérebro anterior), através das artérias cerebrais caudais, originárias dos ramos terminais da artéria basilar. As principais artérias presentes na superfície do encéfalo incluem a basilar que é ímpar, e as pares: artérias vertebrais, cerebelar caudal, trigemial, cerebelar rostral, ramo terminal da basilar, cerebral caudal, ramo comunicante caudal da carótida cerebral, carótida cerebral, ramo comunicante rostral da carótida cerebral, corióidearostral, ramo medial do ramo comunicante rostral, oftálmica interna, cerebral média e artéria cerebral rostral.(AU)

Origen y distribución del nervio ciático en ovejas Morada Nova / Origin and distribution of the sciatic nerve in Morada Nova sheep / Origem e distribuição do nervo isquiático de ovinos da raça Morada Nova

El nervio ciático es el nervio más grande del cuerpo que pertenece a ambos el plexo sacro como el lumbosacra, y hay pocos estudios en la literatura con respecto a la anatomía de este nervio en los pequeños rumiantes. Sabiendo que este nervio es vulnerable a varias lesiones a lo largo de su trayectoria y la carne de la extremidad pélvica es de alto valor comercial, este estudio tuvo como objetivo comprender la formación del nervio ciático y sus territorios de inervación en ovejas Morada Nova. El experimento se llevó a cabo en el Laboratorio de Anatomía de la Universidad Federal Rural de la Zona Semiárida, siendo utilizados 20 medias carcaças derechas de ovino, machos de la raza nueva dirección, con edades comprendidas entre los 6 y 7 meses de edad procedentes de la granja experimental EMPARN-RN. Las carcasas fueron disecadas para ver el nervio ciático, y las piezas almacenadas en cámara fria. Después de diseccionado se examinaron con el ojo desnudo, la variación fue encontrado en la cantidad de las vértebras lumbares y sacras de ovejas, que osciló entre 7 vértebras lumbares y 3 sacrales (90%) y 6 lumbares y cuarto sacrales (10%), cambiando asi el origen del nervio. El nervio ciático se formó por las raíces ventral L7S1S2 (75%) de L6S1S2 (10%) de L7S1S2S3 (10%) y las ramas ventrales S1S2S3 (5%), la distribución de los músculos gluteobiceps, y semimembranoso músculo semitendinoso [...](AU)

The sciatic nerve is the largest nerve in the body, belonging both to the sacral plexus as the lumbosacral, and there are few studies in the literature relating to anatomy of this nerve in small ruminants. Knowing that this nerve is vulnerable to several injuries along its path and that the flesh of the pelvic limb is of high commercial value, this study aimed to understand the formation of the sciatic nerve and its innervation territories in Morada Nova sheep. The experiment was conducted at the Anatomy Laboratory of the Federal Rural University of the Semi-Arid, being rights socks used 20 carcasses heep, of the new address race, aged between 6 and 7 months of age coming from Experimental Farm EMPARN-RN. The carcasses were dissected in order to view the sciatic nerve, and the pieces kept in cold storage. After dissected and examined with the naked eye, it was observed variations in the quantity of the lumbar and sacral vertebrae of sheep, which ranged between 7 and 3 sacral lumbar vertebrae (90%) and 6 lumbar and sacral 4 (10%), changing the origin of the nerve. The sciatic nerve was formed by ventral roots L7S1S2 (75%) of L6S1S2 (10%) of L7S1S2S3 (10%) and ventral branches S1S2S3 (5%), distributing the gluteobiceps muscles, semimembranosus muscle and the semitendinosus and may also innervate the quadriceps muscle of the thigh. The knowledge of these anatomical features can [...](AU)

O nervo isquiático é o maior nervo do corpo pertencendo tanto ao plexo sacral quanto ao lombossacro, sendo raras as citações na literatura referentes à anatomia deste nervo em pequenos ruminantes. Sabendo que este nervo é vulnerável a diversas lesões ao longo de seu trajeto e que a carne do membro pélvico é de alto valor comercial, este trabalho teve como objetivo conhecer a formação do nervo isquiático, bem como seus territórios de inervação em ovinos Morada Nova. O experimento foi conduzido no Laboratório de Anatomia da Universidade Federal Rural do Semi-Árido, sendo utilizadas 20 meias carcaças direitas de ovinos, machos da raça morada nova, com faixa etária entre 6 e 7 meses de idade procedentes da Fazenda Experimental da EMPARN-RN. As carcaças foram dissecadas de modo a visualizar o nervo isquiático e as peças conservadas em câmara fria. Após dissecadas e analisadas a olho nu, verificou-se variações na quantidade de vértebras lombares e sacrais do ovino, que variaram entre 7 vértebras lombares e 3 sacrais (90%) e 6 lombares e 4 sacrais (10%), alterando a origem do nervo. O nervo isquiático foi formado por raízes ventrais de L7S1S2 (75%), de L6S1S2 (10%), de L7S1S2S3 (10%) e por ramos ventrais de S1S2S3 (5%), distribuindo-se pelos músculos glúteobíceps, semitendinoso e músculo semimembranoso, podendo também inervar o músculo quadríceps da coxa. O conhecimento destas [...](AU)

The lumbosacral plexus of the red-rumped agouti (Dasyprocta leporina Linnaeus, 1758) (Rodentia: Caviidae) / Plexo lombossacral da cutia (Dasyprocta leporina Linnaeus, 1758) (Rodentia: Caviidae)

The red-rumped agouti, a small, wild rodent belonging to the Dasyproctidae family, has greatzootechnical potential and adapts well to captivity. In order to contribute to the knowledge regarding the neuroanatomy of the species, the aim of this study was to describe the origin of the nerves forming the lumbosacral plexus by evaluating 12 animals (six males and six females) that had been used in previous experiments. Animals were fixed in a 10% aqueous formaldehyde solution and eviscerated after 72 hours. Major and minor psoas muscles were then retracted to expose the nerves forming the plexus, and the plexus was bleached via cotton soaked in 20-volume hydrogen peroxide for 12 hours for subsequent dissection. Topographical relations of the lumbosacral plexus were grouped into tables and arranged in terms of simple percentages. In seven cases (58.34%), the lumbosacral plexus in the red-rumped agouti stemmed from the ventral roots of the last four lumbar nerves and the first three sacral nerves (Type I: L4-S3). In four animals (33.33%), the lumbosacral plexus stemmed from L5-S3 (Type II), and in one case (8.33%) it stemmed from L5-S4 (Type III). Together, our observations demonstrated that thelumbosacral plexus of the red-rumped agouti comprised the lateral femoral cutaneous, genitofemoral, femoral, obturator, sciatic, cranial gluteal, caudal gluteal, and pudendal nerves. Finally, the origin of the lumbosacral plexus and its constituent spinal nerves was similar to what has been described in other rodents, including the rock cavy, lowland paca, and Spix’s yellow-toothed cavy.

A cutia é um roedor silvestre, de pequeno porte pertencente à família Dasyproctidae, com grandepotencial zootécnico e que se adapta bem ao cativeiro. De forma a contribuir acerca da biologia daespécie, objetivou-se descrever a origem dos nervos que formam o plexo lombossacral. Foram utilizados 12 animais (6 machos e 6 fêmeas), provenientes de experimentos anteriores. Os animais foram fixados em solução aquosa de formaldeído a 10% e após 72 horas, eviscerados. Em seguida os músculos psoas maior e menor foram rebatidos, expondo-se os nervos que formavam o plexo. Sobre estes nervos foi colocado algodão embebido com peróxido de hidrogênio a 20 volumes, permanecendo por 12 horas seguidas para clareamento e consequente dissecação. As relações topográficas do plexo lombossacral agrupadas em tabelas em forma de porcentagem simples. O plexo lombossacral da cutia originou-se em sete casos (58,34%) a partir das raízes ventrais dos quatro últimos nervos lombares e três primeiros nervos sacrais (Tipo I - L4-S3), em quatro animais (33,33%) a partir de L5-S3 (Tipo II) e um caso (8,33%) a partir de L5-S4 (Tipo III). Os nervos que participaram do plexo lombossacral da cutia foram: cutâneo femoral lateral, genitofemoral, femoral, obturatório, isquiático, glúteo cranial, glúteo caudal e nervo pudendo. A origem do plexo lombossacral e os nervos espinhais constituintes deste plexo em cutias foram semelhantes ao descrito em alguns roedores como mocó, paca e preá.

The lumbosacral plexus of the red-rumped agouti (Dasyprocta leporina Linnaeus, 1758) (Rodentia: Caviidae) / Plexo lombossacral da cutia (Dasyprocta leporina Linnaeus, 1758) (Rodentia: Caviidae)

The red-rumped agouti, a small, wild rodent belonging to the Dasyproctidae family, has greatzootechnical potential and adapts well to captivity. In order to contribute to the knowledge regarding the neuroanatomy of the species, the aim of this study was to describe the origin of the nerves forming the lumbosacral plexus by evaluating 12 animals (six males and six females) that had been used in previous experiments. Animals were fixed in a 10% aqueous formaldehyde solution and eviscerated after 72 hours. Major and minor psoas muscles were then retracted to expose the nerves forming the plexus, and the plexus was bleached via cotton soaked in 20-volume hydrogen peroxide for 12 hours for subsequent dissection. Topographical relations of the lumbosacral plexus were grouped into tables and arranged in terms of simple percentages. In seven cases (58.34%), the lumbosacral plexus in the red-rumped agouti stemmed from the ventral roots of the last four lumbar nerves and the first three sacral nerves (Type I: L4-S3). In four animals (33.33%), the lumbosacral plexus stemmed from L5-S3 (Type II), and in one case (8.33%) it stemmed from L5-S4 (Type III). Together, our observations demonstrated that thelumbosacral plexus of the red-rumped agouti comprised the lateral femoral cutaneous, genitofemoral, femoral, obturator, sciatic, cranial gluteal, caudal gluteal, and pudendal nerves. Finally, the origin of the lumbosacral plexus and its constituent spinal nerves was similar to what has been described in other rodents, including the rock cavy, lowland paca, and Spixs yellow-toothed cavy.(AU)

A cutia é um roedor silvestre, de pequeno porte pertencente à família Dasyproctidae, com grandepotencial zootécnico e que se adapta bem ao cativeiro. De forma a contribuir acerca da biologia daespécie, objetivou-se descrever a origem dos nervos que formam o plexo lombossacral. Foram utilizados 12 animais (6 machos e 6 fêmeas), provenientes de experimentos anteriores. Os animais foram fixados em solução aquosa de formaldeído a 10% e após 72 horas, eviscerados. Em seguida os músculos psoas maior e menor foram rebatidos, expondo-se os nervos que formavam o plexo. Sobre estes nervos foi colocado algodão embebido com peróxido de hidrogênio a 20 volumes, permanecendo por 12 horas seguidas para clareamento e consequente dissecação. As relações topográficas do plexo lombossacral agrupadas em tabelas em forma de porcentagem simples. O plexo lombossacral da cutia originou-se em sete casos (58,34%) a partir das raízes ventrais dos quatro últimos nervos lombares e três primeiros nervos sacrais (Tipo I - L4-S3), em quatro animais (33,33%) a partir de L5-S3 (Tipo II) e um caso (8,33%) a partir de L5-S4 (Tipo III). Os nervos que participaram do plexo lombossacral da cutia foram: cutâneo femoral lateral, genitofemoral, femoral, obturatório, isquiático, glúteo cranial, glúteo caudal e nervo pudendo. A origem do plexo lombossacral e os nervos espinhais constituintes deste plexo em cutias foram semelhantes ao descrito em alguns roedores como mocó, paca e preá.(AU)

Morphometric alteration of intestinal epithelium of rats (Rattus norvegicus) submitted to the technique of enteropexy

Background: Due to the numerous complications that enteropexy may cause in domestic animals and humans, this study aimed at investigating the microscopic level, the damage generated by this technique in mice, in order to investigate the morphometric changes caused by enteropexy technique in rats. Materials, Methods & Results: Eighteen Wistar rats were submitted to surgical technique of enteropexy. To evaluate intestinal disorders they were euthanized at 30 (Group I), 60 (group II) and 90 (group III) days after the procedure. The animals were perfused with 2.5% glutaraldehyde and 4% paraformaldehyde for the removal of intestinal fragments for analysis in conventional microscopy and scanning electron microscopy. In classical histopathology, group I presented mild lesions with necrosis of the epithelium and infiltration of mononuclear cells. After 60 days, extensive ischemic necrosis area was observed, characterized by the denudation of epithelium cells and cellular debris in the lumen surface and loss of intestinal crypts. After 90 days (group III) lesions were evident and were characterized by strong coagulative necrosis of epithelial cells and intestinal crypts. Under electron microscopy, group I showed early fusion of the adjacent intestinal walls. After 60 days there was adherence of luminal stenosis and intestinal walls. In group III loss of epithelium and substitution [...](AU)

Morphometric alteration of intestinal epithelium of rats (Rattus norvegicus) submitted to the technique of enteropexy

Background: Due to the numerous complications that enteropexy may cause in domestic animals and humans, this study aimed at investigating the microscopic level, the damage generated by this technique in mice, in order to investigate the morphometric changes caused by enteropexy technique in rats. Materials, Methods & Results: Eighteen Wistar rats were submitted to surgical technique of enteropexy. To evaluate intestinal disorders they were euthanized at 30 (Group I), 60 (group II) and 90 (group III) days after the procedure. The animals were perfused with 2.5% glutaraldehyde and 4% paraformaldehyde for the removal of intestinal fragments for analysis in conventional microscopy and scanning electron microscopy. In classical histopathology, group I presented mild lesions with necrosis of the epithelium and infiltration of mononuclear cells. After 60 days, extensive ischemic necrosis area was observed, characterized by the denudation of epithelium cells and cellular debris in the lumen surface and loss of intestinal crypts. After 90 days (group III) lesions were evident and were characterized by strong coagulative necrosis of epithelial cells and intestinal crypts. Under electron microscopy, group I showed early fusion of the adjacent intestinal walls. After 60 days there was adherence of luminal stenosis and intestinal walls. In group III loss of epithelium and substitution [...]

Cranial and caudal mesenteric arteries in the yellow-toothed cavy (Galea spixii) / Artérias mesentéricas cranial e caudal do preá (Galea spixii)

Background: The yellow-toothed cavy is a wild rodent in the Caviidae family. It adapts well to captivity and may, in thenear future, be bred on a large scale as an alternative source of low cost protein of high nutritional value. Considering thelack of information available on the vascularization of this species digestive system, and with the aim of contributing tothe body of knowledge of this species biology, this study describes the origin and distribution of the cranial and caudalmesenteric arteries of the yellow-toothed cavy.Materials, Methods & Results: Twenty male yellow-toothed cavies, previously used in other experiments (CEUA N.15/2014 and Process N° 23.091.000653/2014-26), were kept in a freezer at the Center for the Multiplication of WildAnimals (CEMAS / UFERSA). The animals were thawed, after which the thoracic aorta of each specimen was caudallycannulated and injected with red- or yellow-colored latex solution. The animals were then fixed in 10% formaldehydesolution, and dissected after 48 h, during which the branches of the cranial and caudal mesenteric arteries were described.In all cases, the cranial mesenteric artery arised from the section of abdominal aorta, at the section between the first andsecond lumbar vertebra, near the celiac artery, and it includes the following arterial branches: the caudal pancreatic duodenal, middle colic, duodenojejunal and right colic arteries, as well as eight to eleven jejune arteries, and the ileocecocolictrunk, from which extend one or two colic branches, five to seven cecum branches, and the ileal artery. In all animals, thecranial mesenteric artery originates from the abdominal aorta, posterior to the testicular arteries...(AU)

Cranial and caudal mesenteric arteries in the yellow-toothed cavy (Galea spixii) / Artérias mesentéricas cranial e caudal do preá (Galea spixii)

Background: The yellow-toothed cavy is a wild rodent in the Caviidae family. It adapts well to captivity and may, in thenear future, be bred on a large scale as an alternative source of low cost protein of high nutritional value. Considering thelack of information available on the vascularization of this species’ digestive system, and with the aim of contributing tothe body of knowledge of this species’ biology, this study describes the origin and distribution of the cranial and caudalmesenteric arteries of the yellow-toothed cavy.Materials, Methods & Results: Twenty male yellow-toothed cavies, previously used in other experiments (CEUA N.15/2014 and Process N° 23.091.000653/2014-26), were kept in a freezer at the Center for the Multiplication of WildAnimals (CEMAS / UFERSA). The animals were thawed, after which the thoracic aorta of each specimen was caudallycannulated and injected with red- or yellow-colored latex solution. The animals were then fixed in 10% formaldehydesolution, and dissected after 48 h, during which the branches of the cranial and caudal mesenteric arteries were described.In all cases, the cranial mesenteric artery arised from the section of abdominal aorta, at the section between the first andsecond lumbar vertebra, near the celiac artery, and it includes the following arterial branches: the caudal pancreatic duodenal, middle colic, duodenojejunal and right colic arteries, as well as eight to eleven jejune arteries, and the ileocecocolictrunk, from which extend one or two colic branches, five to seven cecum branches, and the ileal artery. In all animals, thecranial mesenteric artery originates from the abdominal aorta, posterior to the testicular arteries...

Placenta artificial: um método alternativo no suporte de vida de neonatos prematuros na medicina veterinária / Artificial placenta: an alternative method in support of life of premature infants in veterinary medicine / Placenta artificial: un método alternativo de soporte de vida de prematuros en medicina veterinaria

O modelo de placenta artificial tem como finalidade recriar o ambiente intrauterino, mantendo a circulação fetal e realizando as trocas gasosas e, ao mesmo tempo, permitir a maturação pulmonar. A placenta artificial apresenta-se como uma estratégia de suporte extracorpórea para neonatos prematuros cujos pulmões ainda não estejam completamente desenvolvidos. Este sistema é composto basicamente por uma bomba centrífuga, um oxigenador de membrana e cânulas inseridas nos vasos fetais para renovação do sangue. As tentativas de desenvolver uma placenta artificial foram abandonadas em meados da década de 80, mas com os avanços tecnológicos, em especial com o surgimento dos oxigenadores de membrana de fibra oca e os oxigenadores não microporosos compostos de biomateriais, deixaram os pesquisadores otimistas no desenvolvimento do modelo ideal de placenta artificial. Este artigo apresenta uma revisão dos fatos históricos e discute os avanços e perspectivas da utilização de modelos de placenta artificial na medicina veterinária.

The model of artificial placenta has the intention to recreate the intrauterine environment while maintaining the fetal circulation and gas exchange and at the same time allowing lung maturation. The artificial placenta presents itself as a strategy of extracorporeal support for premature infants whose lungs are not fully developed. This system is basically composed of a centrifugal pump, a membrane oxygenator and cannulas inserted into the fetal vessels for renovation blood. Attempts to develop an artificial placenta were abandoned in the mid-80s, but with technological advances, in particular with the appearance of hollow fiber membrane oxygenators and non microporous oxygenators composite of biomaterials, left hopeful researchers in the development of ideal model of artificial placenta. This article presents a review of the historical facts and discusses the progress and prospects of the use of different models of artificial placenta in veterinary medicine.

El modelo de placenta artificial tiene la intención de recrear el ambiente intrauterino, para mantener la circulación fetal y el intercambio de gas y, al mismo tiempo, permite la maduración pulmonar. La placenta artificial se presenta como una estrategia de apoyo extracorpórea para los prematuros cuyos pulmones no están completamente desarrollados. Este sistema se compone básicamente de una bomba centrífuga, un oxigenador de membrana y cánulas insertadas en los vasos sanguíneos fetales para la renovación de la sangre. Los intentos de desarrollar una placenta artificial fueron abandonadas a mediados de los años 80, pero con los avances tecnológicos, en particular, con la aparición de los oxigenadores de membrana de fibra hueca y los oxigenadores sin microporos compuestos de biomateriales, hicieron los investigadores creer en el desarrollo del modelo ideal de placenta artificial. En este artículo se presenta una revisión de los hechos históricos y se analizan los avances y perspectivas del uso de placenta artificiais en la medicina veterinaria.

Correlação entre o peso, comprimento e anexos fetais de mocós (Kerodon rupestris Wied, 1820) / Correlation between weight, length and fetal membranes of rock cavies (Kerodon rupestris Wied, 1820)

Foi avaliada a existência de correlação entre diferentes anexos fetais de mocós e determinada a relação entre peso do feto e peso da placenta, a relação entre o peso do feto e comprimento do cordão umbilical e a relação entre o peso do feto e comprimento do feto. Foram utilizados anexos fetais e fetos de três, cinco e seis fêmeas, respectivamente, no terço inicial, médio e final de gestação, obtidas no Centro de Multiplicação de Animais Silvestres (CEMAS-UFERSA). Os dados foram expressos em média ± desvio-padrão, bem como valores mínimos e máximos, avaliados pelo programa estatístico GraphPad Prism Versão 6.0. Após a análise dos pressupostos paramétricos, os dados foram submetidos aos Testes de Kruskal-Wallis e Mann-Whitney, e regressão linear. A relação entre peso do feto e peso da placenta demonstrou expressão y = 33,73 + 16,38x com cálculo do coeficiente de correlação entre o peso do feto e o peso da placenta elevado e positivo, evidenciando dependência entre as variáveis (R2 = 0,7251). A relação entre o peso do feto e comprimento do cordão umbilical demonstrou expressão y = 35,64 + 25,64x e a análise de correlação entre as variáveis, positiva (R2 = 0,7201) indicando elevada dependência entre as variáveis. Quanto à relação entre o peso do feto e comprimento do feto, identificou-se uma relação do tipo y = a + bx, cuja expressão definida foi y = 1,26 + 0,41x, com análise de correlação das variáveis apresentando elevada correlação considerando-se o valor de R2 = 0,7890. As variáveis analisadas demonstram uma influência direta no desenvolvimento embrionário e fetal em mocós confirmando a correlação destes com o tamanho do feto.

We evaluated the correlation between different fetal membranes of rock cavies and determined the relationship between fetal weight and placental weight, the relationship between fetal weight and length of the umbilical cord and the relationship between fetal weight and length of the fetus. The fetuses and fetal membranes of three, five and six females respectively in the first third, middle and late gestation were used, obtained from Multiplication Center for Wild Animals of the Federal University Rural of Semiarid (CEMAS-UFERSA). The data were expressed as mean ± standard deviation, minimum and maximum values, evaluated by the statistical program GraphPad Prism version 6.0. After analysis of parametric assumptions, the data were subjected to Kruskal-Wallis’ test and Mann-Whitney’s test and linear regression. The relationship between fetal weight and placental weight showed the expression y = 33.73 + 16.38x with an estimate of the coefficient of correlation between fetal weight and placental weight high and positive, showing dependence between variables (R2 = 0.7251). The relationship between fetal weight and length of the umbilical cord showed expression y = 35.64 + 25.64x and the correlation analysis between variables, positive (R2 = 0.7201) indicating high dependence between variables. Regarding the relationship between fetal weight and length of the fetus, we identified a relationship of the type y = a + bx, whose expression was defined y = 1.26 + 0.41x, with correlation analysis of the variables showing high correlation considering the value of R2 = 0.7890. The variables analyzed demonstrate a direct influence on embryonic andfetal development in rock cavies confirming the correlation of these with the size of the fetus.

Correlação entre o peso, comprimento e anexos fetais de mocós (Kerodon rupestris Wied, 1820) / Correlation between weight, length and fetal membranes of rock cavies (Kerodon rupestris Wied, 1820)

Foi avaliada a existência de correlação entre diferentes anexos fetais de mocós e determinada a relação entre peso do feto e peso da placenta, a relação entre o peso do feto e comprimento do cordão umbilical e a relação entre o peso do feto e comprimento do feto. Foram utilizados anexos fetais e fetos de três, cinco e seis fêmeas, respectivamente, no terço inicial, médio e final de gestação, obtidas no Centro de Multiplicação de Animais Silvestres (CEMAS-UFERSA). Os dados foram expressos em média ± desvio-padrão, bem como valores mínimos e máximos, avaliados pelo programa estatístico GraphPad Prism Versão 6.0. Após a análise dos pressupostos paramétricos, os dados foram submetidos aos Testes de Kruskal-Wallis e Mann-Whitney, e regressão linear. A relação entre peso do feto e peso da placenta demonstrou expressão y = 33,73 + 16,38x com cálculo do coeficiente de correlação entre o peso do feto e o peso da placenta elevado e positivo, evidenciando dependência entre as variáveis (R2 = 0,7251). A relação entre o peso do feto e comprimento do cordão umbilical demonstrou expressão y = 35,64 + 25,64x e a análise de correlação entre as variáveis, positiva (R2 = 0,7201) indicando elevada dependência entre as variáveis. Quanto à relação entre o peso do feto e comprimento do feto, identificou-se uma relação do tipo y = a + bx, cuja expressão definida foi y = 1,26 + 0,41x, com análise de correlação das variáveis apresentando elevada correlação considerando-se o valor de R2 = 0,7890. As variáveis analisadas demonstram uma influência direta no desenvolvimento embrionário e fetal em mocós confirmando a correlação destes com o tamanho do feto.(AU)

We evaluated the correlation between different fetal membranes of rock cavies and determined the relationship between fetal weight and placental weight, the relationship between fetal weight and length of the umbilical cord and the relationship between fetal weight and length of the fetus. The fetuses and fetal membranes of three, five and six females respectively in the first third, middle and late gestation were used, obtained from Multiplication Center for Wild Animals of the Federal University Rural of Semiarid (CEMAS-UFERSA). The data were expressed as mean ± standard deviation, minimum and maximum values, evaluated by the statistical program GraphPad Prism version 6.0. After analysis of parametric assumptions, the data were subjected to Kruskal-Wallis test and Mann-Whitneys test and linear regression. The relationship between fetal weight and placental weight showed the expression y = 33.73 + 16.38x with an estimate of the coefficient of correlation between fetal weight and placental weight high and positive, showing dependence between variables (R2 = 0.7251). The relationship between fetal weight and length of the umbilical cord showed expression y = 35.64 + 25.64x and the correlation analysis between variables, positive (R2 = 0.7201) indicating high dependence between variables. Regarding the relationship between fetal weight and length of the fetus, we identified a relationship of the type y = a + bx, whose expression was defined y = 1.26 + 0.41x, with correlation analysis of the variables showing high correlation considering the value of R2 = 0.7890. The variables analyzed demonstrate a direct influence on embryonic andfetal development in rock cavies confirming the correlation of these with the size of the fetus.(AU)