Department of Neurosurgery, Gulhane Military Medical Academy, Ankara, Turkey.
Clin Anat. 2014 Apr;27(3):383-8. doi: 10.1002/ca.22111. Epub 2012 Jun 13.
The objective of this study is to study the anatomy of lumbar plexus on human fetuses and to establish its morphometric characteristics and differences compared with adults. Twenty lumbar plexus of 10 human fetal cadavers in different gestational ages and genders were dissected. Lumbar spinal nerves, ganglions, and peripheral nerves were exposed. Normal anatomical structure and variations of lumbar plexus were investigated and morphometric analyses were performed. The diameters of lumbar spinal nerves increased from L1 to L4. The thickest nerve forming the plexus was femoral nerve, the thinnest was ilioinguinal nerve, the longest nerve through posterior abdominal wall was iliohypogastric nerve, and the shortest nerve was femoral nerve. Each plexus had a single furcal nerve and this arose from L4 nerve in all fetuses. No prefix or postfix plexus variation was observed. In two plexuses, L1 nerve was in the form of a single branch. Also, in two plexuses, genitofemoral nerve arose only from L2 nerve. Accessory obturator nerve was observed in four plexuses. According to these findings, the morphological pattern of the lumbar plexus in the fetus was found to be very similar to the lumbar plexus in adults.
本研究旨在研究人胎儿腰丛的解剖结构，并确定其与成人相比的形态特征和差异。对 10 具不同胎龄和性别的人胎儿尸体的 20 个腰丛进行了解剖。暴露了腰椎脊神经、神经节和周围神经。研究了正常解剖结构和腰丛的变异，并进行了形态计量分析。腰椎脊神经的直径从 L1 到 L4 逐渐增大。形成腰丛的最粗神经是股神经，最细的是髂腹股沟神经，穿过后腹壁最长的神经是髂腹下神经，最短的神经是股神经。每个丛都有一个单一的分叉神经，所有胎儿均由 L4 神经发出。未观察到前缀或后缀丛的变异。在两个丛中，L1 神经呈单支。此外，在两个丛中，生殖股神经仅由 L2 神经发出。在四个丛中观察到副闭孔神经。根据这些发现，胎儿腰丛的形态模式与成人腰丛非常相似。
