The afferent and sympathetic components of the lumbar spinal outflow to the colon and pelvic organs in the cat. II. The lumbar splanchnic nerves
The afferent and sympathetic components of the lumbar spinal outflow to the colon and pelvic organs in the cat. II. The lumbar splanchnic nerves
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猫的腰椎的传入和交感神经成分流出到结肠和盆腔器官。
DOI：
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发表时间：
1985
期刊：
影响因子：
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通讯作者：
E. McLachlan
中科院分区：
文献类型：
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作者：
R. Baron;W. Jänig;E. McLachlan
猫腰部内脏神经中投射到肠系膜下神经节的腰部感觉和交感神经节前和节后神经元的细胞体已用辣根过氧化物酶逆行标记，该酶应用于肠系膜下神经节附近的切割轴突的中央端。这些标记体细胞的数量、节段分布、位置和大小已被定量确定。将动物一侧的所有腰内脏神经标记后，大多数标记的细胞体位于同侧的背根神经节、腰交感干神经节和脊髓L2-L5节段，其中L3和L4数量最多。一些标记的体细胞位于 L2 的对侧或吻侧。仅标记一根腰内脏神经后，大多数细胞体出现在标记的节段中，但也有少数细胞体存在于头端或尾端的三节段。这些变化总是可以归因于通常通过腰交感干的脊柱外连接。标记的传入体细胞的横截面积相对于整个背根神经节细胞群的横截面积较小。节前细胞体在中间灰质中被标记，从其外侧缘腹外侧延伸到中央管。观察到两个高密度区域：一个位于白质边缘内侧，另一个位于中央管外侧。背外侧组位于中间外侧柱通常界限的内侧和尾侧。平均而言，标记的节前神经元比肠系膜下神经节中未标记的细胞大，其中位于内侧的神经元比位于外侧的神经元更大。根据数据估计，猫的腰内脏神经中约有 4,600 个传入轴突、约 4,600 个节前轴突和约 2,800 个节后轴突行进至肠系膜下神经节。
The cell bodies of the lumbar sensory and sympathetic pre‐ and postganglionic neurons that project to the inferior mesenteric ganglion in the lumbar splanchnic nerves of the cat have been labeled retrogradely with horseradish peroxidase applied to the central end of their cut axons near the inferior mesenteric ganglion. The numbers, segmental distribution, location, and size of these labeled somata have been determined quantitatively. After all the lumbar splanchnic nerves on one side of an animal were labeled, most labeled cell bodies were situated ipsilaterally in dorsal root ganglia, ganglia of the lumbar sympathetic trunk, and spinal cord segments L2–L5, with the maximum numbers in L3 and L4. A few labeled somata lay contra‐laterally or rostral to L2. After labeling of only one lumbar splanchnic nerve, the majority of cell bodies were found in the labeled segment, but a few were also present up to three segments rostral or caudal. These variations could always be attributed to extraspinal connections usually via the lumbar sympathetic trunk. Cross‐sectional areas of labeled afferent somata were small relative to those of the entire population of dorsal root ganglion cells. Preganglionic cell bodies were labeled in the intermediate gray matter extending from its lateral border ventrolaterally across to the central canal. Two regions of high density were observed: one laterally just medial to the edge of the white matter and the other lateral to the central canal. The dorsolateral group lay somewhat medial and caudal to the usual limits of the intermediolateral column. Labeled preganglionic neurons were on the average larger than the unlabeled cells in the inferior mesenteric ganglion, with the group lying medially being larger than those that were laterally positioned. From the data, it is estimated that about 4,600 afferent axons, about 4,600 preganglionic axons, and about 2,800 postganglionic axons travel in the lumbar splanchnic nerves to the inferior mesenteric ganglion of the cat.