摘要
分别破坏了13只大白鼠一侧的耳蜗背侧核、耳蜗腹侧核前部及耳蜗腹侧核后部,用Nauta法追踪了各核在听觉传导路上的投射。耳蜗各核发出的纤维不能直接到达内侧膝状体,但都能到达下丘。因此可以肯定,听觉传导路至少由四级神经原组成。从耳蜗背侧核发出的纤维经背侧听纹主要投射到对侧的下丘及外侧丘系腹侧核。此外,在对侧斜方体背侧核及外侧丘系背侧核内也有少量终止。耳蜗腹侧核前、后两部的投射基本相同,都经斜方体、背侧听纹及中间听纹而投射。在同侧止于上橄榄核簇的外侧半,在对侧止于上橄榄核簇的内侧半、外侧丘系腹侧核、外侧丘系背侧核(少量)及下丘。耳蜗腹侧核前部还有少量至同侧外侧丘系核及下丘者。上橄榄外侧核及斜方体内侧核中可能有局部定位的投射关系。
The dorsal cochlear nucleus,the anterior or the posterior portion of the ventral cochlear nucleus was selectively destroyed unilaterally on 13 albino rats and their efferent projections in the central auditory pathway were studied by the Nauta technique.Fibers from all the 3 parts of the cochlear nuclei project as far as the inferior colli-culus,but none was found to reach the medial geniculate body.It is concluded,there-fore,that the central auditory pathway consists at least of 4 orders of neurons.The emerging fibers from the dorsal cochlear nucleus run in the dorsal acoustic stria and project chiefly into the contralateral nucleus of inferior colliculus and ventral nucleus of lateral lemniscus.Besides,a few fibers terminate in the contralateral dorsal trapezoid nucleus and dorsal nucleus of lateral lemniscus.The projections of the anterior and posterior portions of the ventral cochlear nucleus are essentially the same.Both project via the trapezoid body,the dorsal and the inter-mediate acoustic striae.They terminate in the lateral half of the ipsilateral superior olivary complex and,contralaterally,in the medial half of the superior olivary complex,the ventral and dorsal(a few)nuclei of the lateral lemnicus and the nucleus of inferior colliculus.The anterior portion of the ventral cochlear nucleus,furthermore,has a weak connection with the ipsilateral nuclei of lateral lemniscus and nucleus of inferior colliculus.There is a suggestive topological localization in the lateral superior olivary nucleus and the medial trapezoid nucleus.
作者
鞠躬
舒斯云
左才杰
CHU KUNG;SHU SZU-YUN;TSO TSAI-CHIEH
出处
《解剖学报》
CAS
1965年第3期332-346,共15页
Acta Anatomica Sinica
