Anatomy of the shouder and arm muscles of Cebus libidinosus

Cebus are a very cognitive species. They have expansive motor abilities, demonstrate a high levelof proficiency in using tools to obtain food; and play, using thoracic members. Our objective in thiswork is to study the shoulder and arm muscles of Cebus genus, comparing the findings with theliterature data on humans, chimpanzees and baboons, and assume these aspects are associated withbehavioral characteristics. We conclude that the shoulder and arm muscles of Cebus, in generalterms, are more similar to baboons, perhaps due to the quadruped behavior exhibited in these animals.The conventional term “hand abilities” in primates, specifically in Cebus, originate in motorabilities, generally, from thoracic members. They are controlled by a high encephalic index, and notby specific motor abilities from the intrinsic muscles of the hand and forearm which act on the hand.

Comparative anatomy of the arm nerves of Cebus paella. Description of the dorsoepitroclear muscle - DOI: 10.4025/actascibiolsci.v27i3.1338 / Anatomia comparativa dos nervos do braço de Cebus apella. Descrição do músculo dorsoepitroclear - DOI: 10.4025/actascibiolsci.v27i3.1338

The anatomy of Cebus paella is the missing gap between prosimians and monkeys from the new world. Comparisons between Cebus and human beings are reported, among other comparative considerations in relation to chimpanzees, baboons, cats and dogs. The Brazilian Institute for Environment and Recyclable Natural Resources (Ibama Instituto Brasileiro de Meio Ambiente) from Sete Lagoas, state of Minas Gerais (Brazil), donated eight different species of Cebus paella and they were sacrificed according to the recommendations of the Brazilian Society of Animal Experimentation (Cobea Colégio Brasileiro de Experimentação Animal). There was equivalence in the distribution and innervation of the arm nerves of Cebus and human beings, although there was divergence in the trajectory of median and ulnar nerves, which presented higher similarity with cats and dogs. Anatomical structures not present in human beings, as the epicondilar foramen and the dorsal-olecraneal muscle, differ in the trajectory and distribution of some nerves

A anatomia do Cebus apella é a lacuna que falta entre prossímios e os macacos do novo mundo. Comparações entre Cebus e humanos são relatadas, dentre outras considerações comparativas em relação a chimpanzés, babuínos, gatos e cães. Oito espécimes de Cebus apella foram doados pelo Instituto Brasileiro de Meio Ambiente e Recursos Naturais Renováveis (Ibama), de Sete Lagoas, Estado de Minas Gerais, Brasil, e sacrificados segundo as recomendações do Colégio Brasileiro de Experimentação Animal (Cobea). Houve equivalência na distribuição e inervação dos nervos do braço de Cebus e humanos, embora se tenha encontrado divergência no trajeto dos nervos mediano e ulnar, que apresentaram maior similaridade com cães e gatos. Estruturas anatômicas inexistentes no homem, como o forame epicondilar e o músculo dorso-olécrano, geram disparidade no trajeto e na distribuição de alguns nervos

Anatomia comparativa dos nervos do braço de Cebus apella. Descrição do músculo dorso epitroclear / Comparative anatomy of the arm nerves of Cebus apella. Description of the dorso epitroclear muscle

A anatomia do Cebus apella é a lacuna que falta entre prossímios e os macacosdo novo mundo. Comparações entre Cebus e humanos são relatadas, dentre outrasconsiderações comparativas em relação a chimpanzés, babuínos, gatos e cães. Oitoespécimes de Cebus apella foram doados pelo Instituto Brasileiro de Meio Ambiente eRecursos Naturais Renováveis (Ibama), de Sete Lagoas, Estado de Minas Gerais, Brasil, esacrificados segundo as recomendações do Colégio Brasileiro de Experimentação Animal(Cobea). Houve equivalência na distribuição e inervação dos nervos do braço de Cebus ehumanos, embora se tenha encontrado divergência no trajeto dos nervos mediano e ulnar,que apresentaram maior similaridade com cães e gatos. Estruturas anatômicas inexistentesno homem, como o forame epicondilar e o músculo dorso-olécrano, geram disparidade notrajeto e na distribuição de alguns nervos.

Comparative anatomy of the arm nerves of Cebus apella. Descriptionof the dorsoepitroclear muscle. The anatomy of Cebus apella is the missing gap betweenprosimians and monkeys from the new world. Comparisons between Cebus and humanbeings are reported, among other comparative considerations in relation to chimpanzees,baboons, cats and dogs. The Brazilian Institute for Environment and Recyclable NaturalResources (Ibama – Instituto Brasileiro de Meio Ambiente) from Sete Lagoas, state of MinasGerais (Brazil), donated eight different species of Cebus paella and they were sacrificedaccording to the recommendations of the Brazilian Society of Animal Experimentation(Cobea – Colégio Brasileiro de Experimentação Animal). There was equivalence in thedistribution and innervation of the arm nerves of Cebus and human beings, although therewas divergence in the trajectory of median and ulnar nerves, which presented highersimilarity with cats and dogs. Anatomical structures not present in human beings, as theepicondilar foramen and the dorsal-olecraneal muscle, differ in the trajectory anddistribution of some nerves.