Universidade Federal Rural do Rio de Janeiro, Departamento de Anatomia Animal e Humana, Seropédica, RJ, Brasil.
Universidade Federal do Pampa, Laboratório de Anatomia Animal, Uruguaiana, RS, Brasil.
Braz J Biol. 2023 Nov 13;83:e274411. doi: 10.1590/1519-6984.274411. eCollection 2023.
Morphological studies provide knowledge that allow us to understand how animals interact with the natural environment or the captivity. The goal of this study was to describe the origin and antimeric distribution of lumbosacral plexus nerves in Didelphis aurita and D. albiventris. Fourteen adult cadavers of D. aurita, seven males and seven females, and 13 adult cadavers of D. albiventris, nine males and four females were used. The specimens were sexed, identified, fixed and dissected until the origins of the lumbosacral plexus nerves were exposed. Data were represented as absolute frequency and simple percentage. The lumbosacral plexuses derived a trunk for the femoral and obturator nerves from the ventral branches of L3-L4 (75%) in D. aurita, and in D. albiventris the femoral nerve of L3-L4 (73.1%) and the obturator nerve of L3-L4 (61.5%). In both species, formation of a lumbosacral trunk derived from L5-L6-S1 occurred in 78.6% of D. aurita and 61.5% of D. albiventris. The origin and distribution of lumbosacral plexus nerves of the studied species present similarities with domestic and wild eutherian mammals.
形态学研究提供的知识使我们能够了解动物如何与自然环境或圈养环境相互作用。本研究的目的是描述海牛和白鼻长尾猴的腰骶丛神经的起源和对侧分布。使用了 14 具成年 D. aurita 尸体，其中 7 只为雄性，7 只为雌性，以及 13 具成年 D. albiventris 尸体，其中 9 只为雄性，4 只为雌性。对标本进行了性别鉴定、识别、固定和解剖，直到暴露腰骶丛神经的起源。数据表示为绝对频率和简单百分比。在 D. aurita 中，腰骶丛从 L3-L4 的腹侧支发出股神经和闭孔神经干（75%），而在 D. albiventris 中，股神经来自 L3-L4（73.1%），闭孔神经来自 L3-L4（61.5%）。在这两个物种中，来自 L5-L6-S1 的腰骶干形成发生在 78.6%的 D. aurita 和 61.5%的 D. albiventris 中。所研究物种的腰骶丛神经的起源和分布与家畜和野生真兽类哺乳动物相似。
