透射电镜下观察了延髓背角胶状质亚核内突触形式，结果表明：在三叉神经尾侧脊束核胶状质亚核内存在着大量以树突为中心、少量以轴突为中心的突触复合体。前者依据参与构成复合体神经终末内含突触小泡的形态，可将复合体再分为圆形透明小泡、椭圆形和扁平状透明小泡及含大致密核心小泡（ＬＤＶ）三个亚型，后者仅分为扇贝型和普通型二型。本文详细描述了各型复合体的形态特征，并对其功能进行了讨论。 Transmission electron microscopy observed the medullary dorsal horn jellyfish subnuclear synapse form, the results show that: there are a large number of dendrites in the caudal spinous nucleus, there are a large number of dendrites as a center, a small amount of axons as the center Synaptic complex. The former can be divided into round transparent vesicles, oval and flat transparent vesicles, and vesicles containing large dense core vesicles (LDV) tris A subtype, the latter is divided into only two types of scallop and ordinary type. In this paper, the morphological characteristics of various types of complex are described in detail, and their functions are discussed.