The lumbosacral plexus of the red-rumped agouti (Dasyprocta leporina Linnaeus, 1758) (Rodentia: Caviidae)

• Autor(a) principal: Oliveira, Gleidson Benevides de
• Data de Publicação: 2016
• Outros Autores: Araújo Júnior, Hélio Noberto de, Lopes, Paulo Mateus Alves, Costa, Herson da Silva, Oliveira, Radan Elvis Matias de, Moura, Carlos Eduardo Bezerra de, Paula, Valéria Veras de, Oliveira, Moacir Franco de
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Semina. Ciências Agrárias (Online)
• Texto Completo: https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/23572
• topic: Anatomy; Nervous system; Nerves; Dasyprocta leporina; Rodent.; Anatomia; Sistema nervoso; Nervos; Dasyprocta leporina; Roedor.

The red-rumped agouti is a small-sized wild rodent, belonging to the Dasyproctidae family, with great zootechnical potential, and it adapts well to captivity. In order to contribute to the species biology, this study describes the origin of the nerves forming the lumbosacral plexus. Twelve animals (six males and six females) were used, from previous experiments. The animals were fixed in a 10% formaldehyde aqueous solution and eviscerated after 72 hours. Then, the major and minor psoas muscles were retracted, exposing the nerves forming the plexus. Cotton soaked with 20-volume hydrogen peroxide was placed on these nerves, remaining for 12 hours straight for bleaching and subsequent dissection. The topographical relations of the lumbosacral plexus were grouped into tables and arranged in terms of simple percentage. In 7 cases (58.34%), the lumbosacral plexus in the red-rumped agouti stemmed from the ventral roots of the last 4 lumbar nerves and the first 3 sacral nerves (Type I – L4-S3), in 4 animals (33.33%) it stemmed from L5-S3 (Type II), and in 1 case (8.33%) it stemmed from L5-S4 (Type III). The nerves participating of the lumbosacral plexus in the red-rumped agouti were: lateral femoral cutaneous, genitofemoral, femoral, obturator, sciatic, cranial gluteal, caudal gluteal, and pudendal nerve. The origin of the lumbosacral plexus and the spinal nerves making up this plexus in red-rumped agoutis were similar to that described in other rodents, such as rock cavy, lowland paca and spix's yellow-toothed cavy.