Ishizuka N, Sasaki S, Mannen H
Neurosci Lett. 1982 Nov 30;33(2):135-9. doi: 10.1016/0304-3940(82)90240-3.
Physiologically identified single primary vestibular afferents originating from the horizontal canal in the cat were intraaxonally stained with horseradish peroxidase. All afferents examined gave off one collateral to the interstitial nucleus of Cajal located in the vestibular root bundle in the brainstem. Then these fibers bifurcated into ascending and descending branches in the lateral vestibular nucleus. The ascending branch distributed terminals mainly in the middle part of the superior vestibular nucleus. The descending branch issued several collaterals in the ventrolateral regions of the lateral and inferior vestibular nuclei. These collaterals ran horizontally and reached the medial vestibular nucleus. Terminals were observed mainly in the boundaries between the medial nucleus and the lateral or inferior nucleus. Two types of primary vestibular afferents may be distinguished. Type A fibers had terminal arborizations with plenty of boutons en passage and boutons terminaux, while type B fibers those with a few boutons. The axonal diameter of the main trunk was smaller in type A fibers than in type B fibers.
对源于猫水平半规管的经生理学鉴定的单个初级前庭传入纤维进行辣根过氧化物酶轴突内染色。所有被检查的传入纤维都发出一个侧支至位于脑干前庭根束内的 Cajal 间质核。然后这些纤维在前庭外侧核内分为升支和降支。升支主要在前庭上核中部分布终末。降支在前庭外侧核和前庭下核的腹外侧区域发出几条侧支。这些侧支水平走行并到达前庭内侧核。终末主要见于内侧核与外侧核或下核之间的边界处。可区分出两种类型的初级前庭传入纤维。A 型纤维的终末分支有大量途中扣结和终末扣结，而 B 型纤维的终末分支只有少数扣结。A型纤维主干的轴突直径比 B 型纤维小。
