前庭器感觉上皮内神经分布的横向联系

Traverse connectivity of innervation in the vestibular sensory epithelium

目的了解前庭感觉上皮各神经成分间的横向联系。方法对１０只（１６耳）健康豚鼠应用透射电镜观察其前庭感觉上皮区和上皮下区的神经分布。结果发现Ⅰ、Ⅱ型感觉细胞间有十分密切的横向联系，传入、传出神经纤维及其末梢与神经纤维主干及其分支之间也存在复杂的横向联系。发生在前庭感觉上皮内的神经横向联系是非常复杂的，且是多层次的，它们起源和终止于壶腹嵴或囊斑内。结论前庭感觉上皮内复杂的、多层次的神经横向联系是前庭末梢器内部神经活动的基础。

Objective To further understand the traverse connections of nerve components in the vestibular sensory epithelium. Methods The nerve innervations in the vestibular sensory epithelia and infraepithelia of ten healthy guinea pigs (16 ears) were observed by transmission electron microscopy. Results Typesensory cells were intricately connected with type cells. Afferent and efferent fibers as well as their endings had also complicated connections with nerve trunks and branches. The traverse connections appeared among nerve components in the vestibular sensory epithelium were extremely complicated, forming multilevel connections. They stemmed from and end in the crista ampullaris and the maculae. Conclusion These complicated and multilevel connections are the basis of nerve activity in the vestibular apparatus.