Funakoshi K, Abe T, Kishida R
Department of Anatomy, Yamaguchi University School of Medicine, 1144 Kogushi, Ube, 755 Japan.
Cell Tissue Res. 1996 Apr;284(1):111-6. doi: 10.1007/s004410050571.
Little is known about the spinal sympathetic organization in teleosts. We examined the location of the sympathetic preganglionic neurons with horseradish peroxidase (HRP) labeling. After HRP application to the sympathetic trunk or celiac ganglion, labeled neurons were found just dorsal - dorsolateral to the central canal. They form a cell column (central autonomic nucleus) at the level of the posterior rootlet of the first spinal nerve to the third spinal nerve. HRP application to the sympathetic trunk produced labeling in almost the entire central autonomic nucleus, but HRP application to the celiac ganglion produced labeling in only the rostral half of the central autonomic nucleus. These results suggest that there is some topographical arrangement in the rostrocaudal part of the central autonomic nucleus. On the other hand, the fact that the sympathetic preganglionic neurons are within a single cell column and have no mediolateral segregation means that the target-related or function-associated mediolateral arrangement found in tetrapods is lacking in this species. We also found some labeling in the central autonomic nucleus after HRP application to the cranial nerves. This may indicate that the preganglionic neurons project to the cranial nerves.
人们对硬骨鱼的脊髓交感神经组织了解甚少。我们用辣根过氧化物酶（HRP）标记法研究了交感神经节前神经元的位置。将HRP注入交感干或腹腔神经节后，在中央管背侧-背外侧发现了标记神经元。它们在第一脊神经至第三脊神经后根水平形成一个细胞柱（中央自主核）。将HRP注入交感干后，几乎整个中央自主核都出现了标记，但将HRP注入腹腔神经节后，仅在中央自主核的头侧半出现标记。这些结果表明，中央自主核在头尾方向上存在某种拓扑排列。另一方面，交感神经节前神经元位于单个细胞柱内且没有内外侧分隔，这意味着该物种缺乏在四足动物中发现的与靶标相关或功能相关的内外侧排列。在将HRP注入脑神经后，我们还在中央自主核中发现了一些标记。这可能表明节前神经元投射到了脑神经。
