应用包埋前染色免疫电镜技术研究胆碱乙酰化酶免疫活性（ｃｈｏｌｉｎｅａｃｅｔｙｌｔｒａｎｓｆｅｒａｓｅｉｍｍｕｎｏｒｅａｃｔｉｖｉｔｙ，ＣｈＡＴ－ＩＲ）阳性神经在大鼠前庭终器的分布。结果发现ＣｈＡＴ－ＩＲ阳性神经末梢在大鼠前庭终器呈三种支配类型：（１）ＣｈＡＴ－ＩＲ阳性神经末梢与包绕Ⅰ型毛细胞的传入神经盏形成轴－树突触；（２）ＣｈＡＴ－ＩＲ阳性神经末梢与Ⅱ型毛细胞形成轴－体突触；以及（３）ＣｈＡＴ－ＩＲ阳性神经末梢之间形成轴－轴突触样联系。研究结果显示：ＣｈＡＴ－ＩＲ阳性传出神经在大鼠前庭终器有广泛的分布。其神经支配类型及意义有待进一步探讨。 Embedding pre-staining immunoelectron microscopy was used to investigate the distribution of choline acetyltransfersemoimmunoreactivity (ChAT-IR) positive neurons in rat vestibular end-devices. ChAT-IR-positive nerve endings were found to have three dominant types in the rat vestibular device: (1) ChAT-IR-positive nerve terminals formed axonal-dendritic contacts with afferent nerve cells surrounding type I hair cells; (2) ) ChAT-IR-positive nerve terminals form axonal synapses with type II hair cells; and (3) Axon-axon contact formation between ChAT-IR-positive nerve terminals. The results showed that: ChAT-IR-positive neurons in the forebrain device in rats has a wide distribution. The type and significance of its innervation need to be further explored.