THE AFFERENT AND SYMPATHETIC COMPONENTS OF THE LUMBAR SPINAL OUTFLOW TO THE COLON AND PELVIC ORGANS IN THE CAT .2. THE LUMBAR SPLANCHNIC NERVES
THE AFFERENT AND SYMPATHETIC COMPONENTS OF THE LUMBAR SPINAL OUTFLOW TO THE COLON AND PELVIC ORGANS IN THE CAT .2. THE LUMBAR SPLANCHNIC NERVES
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DOI：
10.1002/cne.902380203
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发表时间：
1985-01-01
影响因子：
2.5
通讯作者：
MCLACHLAN, EM
中科院分区：
文献类型：
--
作者：
BARON, R;JANIG, W;MCLACHLAN, EM
用辣根过氧化物酶逆行标记猫腰内脏神经中投射到肠系膜下神经节的腰感觉和交感节前和节后神经元的胞体，辣根过氧化物酶应用于肠系膜下神经节附近的切断轴突的中央端。对这些标记胞体的数量、节段分布、位置和大小进行了定量测定。将动物一侧腰内脏神经全部标记后，大部分标记胞体位于同侧背根神经节、腰交感干神经节和[腰] L2 ~ L5脊髓节段，以L3和L4最多。少数标记胞体位于L2的对侧或吻侧。仅标记1条腰内脏神经后，大多数细胞体出现在标记的节段中，但也有少数细胞体出现在头侧或尾侧的3个节段中。这些变化通常可归因于脊髓外的联系，通常通过腰交感神经干。标记的传入胞体的横截面积相对于背根神经节细胞的整个人口小。神经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：一个在白色物质边缘的外侧，另一个在中央管的外侧。背外侧组位于中间外侧柱通常界限的内侧和尾侧。标记的节前神经元的平均值大于未标记的细胞在肠系膜下神经节，与组躺在中间大于那些被横向定位。据估计，. apprx。4600个传入轴突，约4600个节前轴突，和2800个节后轴突在猫的腰内脏神经中行进到肠系膜下神经节。
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 1 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 [lumbar] L2-L5, with the maximum numbers in L3 and L4. A few labeled somata lay contralaterally or rostral to L2. After labeling of only 1 lumbar splanchnic nerve, the majority of cell bodies were found in the labeled segment, but a few were also present up to 3 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 taht were laterally positioned. It is estimated that .apprx. 4600 afferent axons, .apprx. 4600 preganglionic axons, and .apprx. 2800 postganglionic axons travel in the lumbar splanchnic nerves to the inferior mesenteric ganglion of the cat.