9 research outputs found
Origem e distribuição do plexo braquial de Saimiri sciureus
Os autores descreveram a origem e composição do plexo braquial de quatro Saimiri sciureus, pertencentes ao Centro Nacional de Primatas (Cenp), Ananindeua/PA, os quais foram fixados com formaldeĂdo e dissecados. Os achados revelaram que o plexo braquial desta espĂ©cie Ă© constituĂdo por fibras neurais provenientes da uniĂŁo das raĂzes dorsais e ventrais das vĂ©rtebras cervicais C4 a C8 e torácica T1, e organizado em quatro troncos. Cada tronco formou um nervo ou um grupo de nervos, cuja origem variou entre os animais; na maioria, foi encontrado o tronco cranial originando o nervo subclávio, o tronco mĂ©dio-cranial dando origem aos nervos supraescapular, subescapular, parte do radial, e em alguns casos ao nervo axilar, nervo musculocutâneo e ao nervo mediano; o tronco mĂ©dio-caudal formou parte do nervo radial, e em alguns casos os nervos axilar, nervo musculocutâneo, nervo mediano, nervo toracodorsal, nervo ulnar e nervo cutâneo medial do antebraço, sendo os dois Ăşltimos tambĂ©m originados no tronco caudal
Pervasive gaps in Amazonian ecological research
Biodiversity loss is one of the main challenges of our time,1,2 and attempts to address it require a clear un derstanding of how ecological communities respond to environmental change across time and space.3,4
While the increasing availability of global databases on ecological communities has advanced our knowledge
of biodiversity sensitivity to environmental changes,5–7 vast areas of the tropics remain understudied.8–11 In
the American tropics, Amazonia stands out as the world’s most diverse rainforest and the primary source of
Neotropical biodiversity,12 but it remains among the least known forests in America and is often underrepre sented in biodiversity databases.13–15 To worsen this situation, human-induced modifications16,17 may elim inate pieces of the Amazon’s biodiversity puzzle before we can use them to understand how ecological com munities are responding. To increase generalization and applicability of biodiversity knowledge,18,19 it is thus
crucial to reduce biases in ecological research, particularly in regions projected to face the most pronounced
environmental changes. We integrate ecological community metadata of 7,694 sampling sites for multiple or ganism groups in a machine learning model framework to map the research probability across the Brazilian
Amazonia, while identifying the region’s vulnerability to environmental change. 15%–18% of the most ne glected areas in ecological research are expected to experience severe climate or land use changes by
2050. This means that unless we take immediate action, we will not be able to establish their current status,
much less monitor how it is changing and what is being lostinfo:eu-repo/semantics/publishedVersio
Pervasive gaps in Amazonian ecological research
Biodiversity loss is one of the main challenges of our time,1,2 and attempts to address it require a clear understanding of how ecological communities respond to environmental change across time and space.3,4 While the increasing availability of global databases on ecological communities has advanced our knowledge of biodiversity sensitivity to environmental changes,5,6,7 vast areas of the tropics remain understudied.8,9,10,11 In the American tropics, Amazonia stands out as the world's most diverse rainforest and the primary source of Neotropical biodiversity,12 but it remains among the least known forests in America and is often underrepresented in biodiversity databases.13,14,15 To worsen this situation, human-induced modifications16,17 may eliminate pieces of the Amazon's biodiversity puzzle before we can use them to understand how ecological communities are responding. To increase generalization and applicability of biodiversity knowledge,18,19 it is thus crucial to reduce biases in ecological research, particularly in regions projected to face the most pronounced environmental changes. We integrate ecological community metadata of 7,694 sampling sites for multiple organism groups in a machine learning model framework to map the research probability across the Brazilian Amazonia, while identifying the region's vulnerability to environmental change. 15%–18% of the most neglected areas in ecological research are expected to experience severe climate or land use changes by 2050. This means that unless we take immediate action, we will not be able to establish their current status, much less monitor how it is changing and what is being lost
Origem e distribuição do plexo braquial de Saimiri sciureus
Os autores descreveram a origem e composição do plexo braquial de quatro Saimiri sciureus, pertencentes ao Centro Nacional de Primatas (Cenp), Ananindeua/PA, os quais foram fixados com formaldeĂdo e dissecados. Os achados revelaram que o plexo braquial desta espĂ©cie Ă© constituĂdo por fibras neurais provenientes da uniĂŁo das raĂzes dorsais e ventrais das vĂ©rtebras cervicais C4 a C8 e torácica T1, e organizado em quatro troncos. Cada tronco formou um nervo ou um grupo de nervos, cuja origem variou entre os animais; na maioria, foi encontrado o tronco cranial originando o nervo subclávio, o tronco mĂ©dio-cranial dando origem aos nervos supraescapular, subescapular, parte do radial, e em alguns casos ao nervo axilar, nervo musculocutâneo e ao nervo mediano; o tronco mĂ©dio-caudal formou parte do nervo radial, e em alguns casos os nervos axilar, nervo musculocutâneo, nervo mediano, nervo toracodorsal, nervo ulnar e nervo cutâneo medial do antebraço, sendo os dois Ăşltimos tambĂ©m originados no tronco caudal
Os ramos colaterais da aorta abdominal em jaguatirica (Leopardus pardalis)
A jaguatirica (Leopardus pardalis) Ă© uma das espĂ©cies de felino silvestre que pouco foi investigada quanto a sua morfologia. Assim, o estudo objetivou detalhar a origem e distribuição dos ramos colaterais da aorta abdominal deste animal. Avaliou-se dois exemplares, sendo um macho e uma fĂŞmea, jovens, provenientes de Paragominas-PA, doados ao LaboratĂłrio de Pesquisa MorfolĂłgica Animal (LaPMA) da Universidade Federal Rural da AmazĂ´nia (UFRA). O sistema arterial foi preenchido com látex pigmentado de vermelho e os cadáveres foram preservados com solução de formaldeĂdo tamponado a 10%. A aorta abdominal do L. pardalis teve origem entre T12 e L1, sendo a artĂ©ria celĂaca o primeiro ramo visceral no sentido crânio-caudal, resultando nas artĂ©rias hepática, gástrica esquerda e esplĂŞnica. A artĂ©ria mesentĂ©rica cranial surgiu como segundo ramo da aorta abdominal, originando as artĂ©rias jejunais. Na sequĂŞncia localizamos artĂ©ria pancreáticoduodenal caudal, artĂ©rias ileais, artĂ©rias ileocĂłlicas, artĂ©rias renais direita e esquerda, artĂ©rias adrenais direita e esquerda e artĂ©rias ováricas ou testiculares direita e esquerda. Parietalmente, a aorta abdominal originou em mĂ©dia seis ramos lombares, bem como a artĂ©ria frenicoabdominal, as artĂ©rias circunflexas ilĂacas profundas e artĂ©rias ilĂacas externa e interna. A aorta abdominal gerou ainda a artĂ©ria mesentĂ©rica caudal, a qual dividiu-se em artĂ©rias cĂłlica esquerda e retal cranial. A artĂ©ria cĂłlica esquerda seguiu cranialmente paralela ao cĂłlon descendente irrigando-o, originando em mĂ©dia 18 ramos, e anastomosando-se com a artĂ©ria cĂłlica mĂ©dia. A artĂ©ria retal cranial seguiu em direção caudal distribuindo oito ramos Ă porção final do cĂłlon descendente e ao reto, e uniu-se com a artĂ©ria retal mĂ©dia. Por fim, a aorta abdominal emitiu como ramo terminal a artĂ©ria sacral mediana. A vascularização arterial abdominal desta espĂ©cie Ă© bastante semelhante ao descrito em felinos domĂ©sticos e demais mamĂferos, com diferenças quanto ao nĂşmero de artĂ©rias jejunais e origem das artĂ©rias renais
Anatomy and morphometric aspects of the trachea of Saimiri sciureus Linnaeus, 1758: knowledge for emergency procedures
The aim of this work is to study the morphological characteristics of the trachea of Saimiri sciureus through quantification and measurement of the cartilaginous rings, providing information to facilitate the election of more appropriate endotracheal tube, laryngeal mask or tracheostomy tube for anesthetic and emergency procedures, as it is a species of Neotropical primates most commonly used as biological models, and little is known about their morphology. Nine animals were investigated, being 4 adults and 5 young acquired from the Centro Nacional de Primatas (National Primate Center - CENP) - Ananindeua - PA, which died from natural causes and then fixed in aqueous buffered formalin 10%. Saimiri sciureus trachea comprises an average of 32.8 incomplete rings and an average length of 3.74 cm in young animals, while in adults it demonstrated an average of 30.25 rings and average length of 3.67 cm. The shape of the light and its proportion varied along the trachea. Endotracheal tube with a diameter the 2.0 - 2.5mm, laryngeal mask number 1.0 or tracheostomy tube neonatal Shiley number 3.0, can be placed in animals weighing 600g - 1.2 Kg. Given the great importance of the species studied, which is widely used as a biological model, the detailing on the morphology and morphometry of tracheal animal studies provides new approaches needed in respiratory emergency, as well as, facilitates the development of future anesthetic protocols.<br>Estudou-se as caracterĂsticas morfolĂłgicas da traqueia do Saimiri sciureus atravĂ©s da quantificação e mensuração dos anĂ©is cartilaginosos, a fim de fornecer informações que facilitem a eleição mais adequada de sonda endotraqueal, máscara larĂngea ou cânula de trasqueostomia para procedimentos anestĂ©sicos e de emergĂŞncia, visto que Ă© uma das espĂ©cies de primatas neotropicais mais comumente utilizadas como modelos biolĂłgicos e pouco se sabe sobre sua morfologia. Foram utilizados nove animais, sendo quatro adultos e cinco jovens, oriundos do Centro Nacional de Primatas (CENP) - Ananindeua - PA, os quais vieram a Ăłbito por causas naturais e, posteriormente, foram fixados em solução aquosa de formol tamponado a 10%. A traqueia do Saimiri sciureus Ă© composta por uma mĂ©dia de 32, 8 anĂ©is incompletos nos animais jovens e comprimento mĂ©dio de 3, 74cm, já os adultos apresentam uma mĂ©dia de 30, 25 anĂ©is e comprimento mĂ©dio de 3, 67cm. A forma da luz e suas proporções variaram ao longo da traqueia. Sonda endotraqueal com diâmetro de 2, 0 - 2, 5mm, máscara larĂngea nĂşmero 1, 0 ou cânula de traqueostomia neonatal Shiley nĂşmero 3, 0, podem ser colocados em animais pesando 600g - 1, 2 K. Dada a grande importância da espĂ©cie estudada, que Ă© amplamente utilizada como modelo biolĂłgico, o detalhamento sobre o estudo da morfologia e morfometria traqueal animal, fornece novas abordagens necessárias em emergĂŞncia respiratĂłria, bem como facilita o desenvolvimento de futuros protocolos anestĂ©sicos
Can Paraplegia by Disruption of the Spinal Cord Tissue Be Reversed? The Signs of a New Perspective
Institute of Animal Health and Production/Federal Rural University of Amazon. Grant Number: ISPA 20/2018Federal Rural University of Amazonia. Faculty of Veterinary Medicine. Institute of Animal Health and Production. Belém, PA, Brazil.Federal Rural University of Amazonia. Faculty of Veterinary Medicine. Institute of Animal Health and Production. Belém, PA, Brazil.Federal Rural University of Amazonia. Faculty of Veterinary Medicine. Institute of Animal Health and Production. Belém, PA, Brazil.Federal Rural University of Amazonia. Faculty of Veterinary Medicine. Institute of Animal Health and Production. Belém, PA, Brazil.Federal Rural University of Amazonia. Faculty of Veterinary Medicine. Institute of Animal Health and Production. Belém, PA, Brazil.Freelance Veterinary Medicine. Belém, PA, Brazil.Federal Rural University of Amazonia. Faculty of Veterinary Medicine. Institute of Animal Health and Production. Belém, PA, Brazil.Federal Rural University of Amazonia. Faculty of Veterinary Medicine. Institute of Animal Health and Production. Belém, PA, Brazil.Ministério da Saúde. Secretaria de Vigilância em Saúde. Instituto Evandro Chagas. Ananindeua, PA, Brasil / Federal University of Pará. Institute of Natural Sciences. Belém, PA, Brazil.Ministério da Saúde. Secretaria de Vigilância em Saúde. Instituto Evandro Chagas. Ananindeua, PA, Brasil / Federal University of Pará. Institute of Natural Sciences. Belém, PA, Brazil.University of São Paulo. Institute of Biomedical Sciences. Department of Microbiology. São Paulo, SP, Brazil.University of São Paulo. Faculty of Veterinary Medicine and Animal Science. Department of Surgery. São Paulo, SP, Brazil.University of São Paulo. Institute of Biomedical Sciences. Department of Microbiology. São Paulo, SP, Brazil.University of São Paulo. Institute of Biomedical Sciences. Department of Microbiology. São Paulo, SP, Brazil.Federal Rural University of Amazonia. Faculty of Veterinary Medicine. Institute of Animal Health and Production. Belém, PA, Brazil.Central nervous system (CNS) trauma is often related to tissue loss, leading to partial or complete disruption of spinal cord function due to neuronal death. Although generally irreversible, traditional therapeutic efforts, such as physical therapy exercises, are generally recommended, but with a poor or reduced improvement of the microenvironment, which in turn stimulates neuroplasticity and neuroregeneration. Mesenchymal stem cells (MSCs) have paracrine, immunomodulatory, and anti-inflammatory effects. Here we use stem cells to see if they can promote not only physical but also the functional regeneration of neuronal tissue in dogs with CNS traumas. Two dogs, one with chronic spinal cord injury and one with subacute spinal cord injury, underwent infusion of autologous MSCs in association with physiotherapy. The two treatments in combination were able to partially or completely recover the dog's walking movement again. The treatment of MSCs in association with physical therapy improved the microenvironment, which could be evidence of a paradigm shift that the CNS is not capable of functional regeneration after aggressive traumas