Analysis of unmyelinated nerve fibers in the human mandibular nerve

2001年，从30具成人尸体中，取6具下颌骨标本，进行下颌神经的解剖学研究。年龄26 ~ 86岁。硝化纤维|在福尔马林固定后，接着用铬酸溶液固定，制备包埋的组织切片（25 μ m厚，Masson-Goldner-后藤染色）。使用配备有显微镜和绘图管的图像分析仪进行神经纤维轴突的评价。人下颌骨神经中的无髓神经纤维的大小（面积）随年龄的增长而减少。2002年对有髓神经纤维的大小随年龄的变化进行了类似的评价。这种现象在几乎所有的外周神经中都可以观察到。然而，为什么只有人类下颌神经的无髓纤维显示出尺寸增加的原因仍然没有解决。

In the year of 2001, the material of the mandibular nerves was removed from the six human corpora with dentulous jaws out of 30 cadavars for anatomic dissections. The age ranged from 26 to 86 years. Nitrocellulose|-embedded tissue sections(25um thick, Masson-Goldner-Goto stain) were prepared after fixation formalin followed by chromic acid solution. Evaluation of nerve fiber axons were made using an image analyzer equipped with a microscope and a drawing tube. Unmyelinated nerve fibers in the human mandibulae nerve showed a decrease in size (area) with age. In the year of 2002, the similar evalutions were made regarding the myelinated nerve fibers on the size with age. This phenomenon can be observed in almost all peripheral nerves. However, the reason why only the unmyelinated fibers of the human mandibular nerve show an increase in size still remains unsolved.