Shibamori Y, Tamamaki N, Saito H, Nojyo Y
Department of Otorhinolaryngology, Fukui Medical School, Japan.
Brain Res. 1994 May 23;646(2):223-9. doi: 10.1016/0006-8993(94)90082-5.
Wheat germ agglutinin-horseradish peroxidase conjugate was injected in the unilateral superior cervical ganglion (SCG), and the projection pathways of postganglionic sympathetic nerve fibers innervating the cochlea were traced in the rat. The labeled axons advanced along the internal carotid artery (ICA), and a few advanced caudally in the major petrosal nerve (MPN) and entered the facial nerve, while the majority ran rostral to the pterygopalatine ganglion at the point where they crossed the MPN in the carotid canal. The rest of the labeled fibers remained on the surface of the ICA and advanced to the cranial cavity. Most of the labeled fibers along the facial nerve joined the cochlear nerve and finally reached the osseous spiral lamina through the spiral ganglion. Some of the labeled fibers ran along the anterior inferior cerebellar artery from the basilar artery which was previously thought to have been the only pathway. We could not find any labeled fiber on the modiolar artery from anterior inferior cerebellar artery in the cochlea. These observations are consistent with our hypothesis that the sympathetic fibers innervating the neural tissues or related structures follow nerve fibers and meninges as matrices of projection pathways rather than arteries.
将小麦胚凝集素 - 辣根过氧化物酶复合物注射到大鼠单侧颈上神经节（SCG）中，追踪支配耳蜗的节后交感神经纤维的投射通路。标记的轴突沿着颈内动脉（ICA）前行，少数沿岩大神经（MPN）向尾侧延伸并进入面神经，而大多数在颈动脉管内与MPN交叉处向翼腭神经节的头侧延伸。其余标记纤维留在ICA表面并进入颅腔。沿面神经的大多数标记纤维加入蜗神经，最终通过螺旋神经节到达骨螺旋板。一些标记纤维从前庭下动脉沿基底动脉走行，而基底动脉以前被认为是唯一的通路。在耳蜗中，我们在前庭下动脉的蜗轴动脉上未发现任何标记纤维。这些观察结果与我们的假设一致，即支配神经组织或相关结构的交感纤维沿着神经纤维和脑膜作为投射通路的基质，而不是动脉走行。
