Berardinelli P, Scapolo P A, Barazzoni A M, Russo V, Bortolami R
Department of Veterinary and Agroalimentary Sciences, University of Teramo, Teramo, Italy.
Anat Rec. 2000 Nov 1;260(3):294-8. doi: 10.1002/1097-0185(20001101)260:3<294::AID-AR66>3.0.CO;2-C.
In the present investigation, the fiber content and the diameter spectra of the intracranial portion of the three oculomotor nerves (oculomotor, trochlear, and abducens nerves) were analysed in sheep by light and electron microscopy. It was determined that up to 14.98% of fibers in the oculomotor nerve, 17.01% in the trochlear nerve, and 11.87% in the abducens nerve were unmyelinated. The myelinated fibers showed a bimodal distribution in their size spectrum in all three nerves, with a majority of large myelinated axons, but a considerable proportion of small myelinated fibers, as well. The sensory function of the unmyelinated fibers present in the three oculomotor nerves is discussed also on the basis of our previous morphofunctional investigations.
在本研究中，通过光学显微镜和电子显微镜对绵羊的三条动眼神经（动眼神经、滑车神经和展神经）颅内部分的纤维含量和直径谱进行了分析。结果确定，动眼神经中高达14.98%的纤维、滑车神经中17.01%的纤维以及展神经中11.87%的纤维是无髓鞘的。在所有三条神经中，有髓鞘纤维在其大小谱中呈现双峰分布，大多数是大型有髓鞘轴突，但也有相当比例的小型有髓鞘纤维。还根据我们之前的形态功能研究讨论了三条动眼神经中存在的无髓鞘纤维的感觉功能。
