有髓神经纤维是组织学实验教学观察的重要内容之一，实验材料大多数选用坐骨神经。在一张切片上要观察纵横两个断面。但是，纵断面上的神经纤维常常呈现波纹状，结构紊乱，不能寻找到一条完全纵行的神经纤维。为此，我们经反复摸索，成功地制作了坐骨神经纵切片，特介绍如下。 Myelinated nerve fibers are one of the most important contents of histological experimental teaching observation. Most of experimental materials use sciatic nerve. In a slice to observe both vertical and horizontal cross-section. However, the nerve fibers on the longitudinal section are often corrugated, disorganized, and unable to find a complete longitudinal nerve fiber. To this end, we have repeatedly explored the successful production of the longitudinal section of the sciatic nerve, special introduction is as follows.