Hildebrand C, Oscarsson A, Risling M
Department of Cell Biology, Faculty of Health Sciences, University of Linköping, Sweden.
Brain Res. 1988 Jun 21;453(1-2):401-7. doi: 10.1016/0006-8993(88)90188-6.
Cat trochlear and abducens nerves were studied by electron microscopy at two different levels. Five mm peripheral to the exit from the brainstem, the average number of myelinated axons is 965 in the trochlear nerve and 1901 in the abducens nerve. The size spectrum is unimodal and small myelinated axons predominate. Both nerves contain 16% unmyelinated axons at this level. At the PNS/CNS transition, the nerve fascicles contain few unmyelinated axons, but bundles of such axons are present in the adjacent pia mater. We suggest that the trochlear and abducens nerves may channel unmyelinated sensory and/or autonomic axons to the leptomeningeal blood vessels and the pia mater of the brainstem.
通过电子显微镜在两个不同水平对猫的滑车神经和展神经进行了研究。在脑干出口外周5毫米处，滑车神经中髓鞘化轴突的平均数量为965条，展神经中为1901条。大小谱为单峰，小的髓鞘化轴突占主导。在此水平，两条神经均含有16%的无髓鞘轴突。在周围神经系统/中枢神经系统交界处，神经束中几乎没有无髓鞘轴突，但在相邻软脑膜中有此类轴突束。我们认为，滑车神经和展神经可能将无髓鞘感觉和/或自主神经轴突导向软脑膜血管和脑干软脑膜。
