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目的 观察大鼠体神经 内脏神经吻合后神经纤维的再生。方法 人工建立体神经 内脏神经反射弧大鼠模型 ,用电镜配合光镜观察 1 2只大鼠术后 1、4、8、2 4周神经变性与再生。结果 术后 8、2 4周大体观察见神经吻合口位置稍许膨大 ,光镜观察发现术后 8周吻合口位置可见新生的轴突 ,电镜观察见术后 1周吻合口及其远近段神经纤维发生Waller变性 ,术后 4周吻合口部位有再生的有髓和无髓纤维 ,术后 8周新生的髓鞘进一步增厚 ,板层结构清晰可见 ,术后 2 4周 ,髓鞘成熟 ,轴浆富含微管、微丝、线粒体。结论 体神经运动纤维能够再生长入并替代内脏神经节前纤维 ;再生的神经纤维具备基本正常的周围神经超微结构目的 观察大鼠体神经 内脏神经吻合后神经纤维的再生。方法 人工建立体神经 内脏神经反射弧大鼠模型 ,用电镜配合光镜观察 1 2只大鼠术后 1、4、8、2 4周神经变性与再生。结果 术后 8、2 4周大体观察见神经吻合口位置稍许膨大 ,光镜观察发现术后 8周吻合口位置可见新生的轴突 ,电镜观察见术后 1周吻合口及其远近段神经纤维发生Waller变性 ,术后 4周吻合口部位有再生的有髓和无髓纤维 ,术后 8周新生的髓鞘进一步增厚 ,板层结构清晰可见 ,术后 2 4周 ,髓鞘成熟 ,轴浆富含微管、微丝、线粒体。结论 体神?
Objective To observe the regeneration of nerve fibers after anastomosis of the rat body and internal organs. Methods The rat model of somatic neuro-reflex arc was established artificially. The neurodegeneration and regeneration of 1, 2, 4, 8, 24 weeks after operation were observed by electron microscope and light microscope. Results At 8 and 24 weeks postoperatively, the location of nerve anastomosis was slightly enlarged. The axon was observed at the anastomotic position 8 weeks after operation. The anastomotic and proximal and distal nerve fibers were observed by electron microscopy Waller degeneration occurred, there were regenerated myelinated and non-myelinated fibers at the anastomotic site 4 weeks after operation. Myelin sheath thickening was observed at 8 weeks after operation. The lamellar structure was clearly visible. At 24 weeks after operation, Pulp-rich microtubules, microfilaments, mitochondria. Conclusions Nerve fibers can regenerate and replace the visceral preganglionic fibers. The regenerated nerve fibers possess basically normal ultrastructure of peripheral nerves. OBJECTIVE To observe the regeneration of nerve fibers after anastomosis of the somatic and visceral nerves in rats. Methods The rat model of somatic neuro-reflex arc was established artificially. The neurodegeneration and regeneration of 1, 2, 4, 8, 24 weeks after operation were observed by electron microscope and light microscope. Results At 8 and 24 weeks postoperatively, the location of nerve anastomosis was slightly enlarged. The axon was observed at the anastomotic position 8 weeks after operation. The anastomotic and proximal and distal nerve fibers were observed by electron microscopy Waller degeneration occurred, there were regenerated myelinated and non-myelinated fibers at the anastomotic site 4 weeks after operation. Myelin sheath thickening was observed at 8 weeks after operation. The lamellar structure was clearly visible. At 24 weeks after operation, Pulp-rich microtubules, microfilaments, mitochondria. Body God?