为了研究GABA与MOR在吗啡镇痛中的相互关系，用包埋前免疫组织化学方法结合包埋后肢体金电镜技术，观察了猫脊髓后角浅层内γ氨基丁酸GABA）能轴突终末与表达阿片μ受体神经元之间的突触联系．结果表明，后角浅层内约有三分之一的MOR阳性树突和胞体与GABA阳性终未形成突触连接? In order to investigate the relationship between GABA and MOR in morphine analgesia, the pre-embedding immunohistochemical method combined with gold-electron microscopy of embedded limbs was used to observe the effect of γ-aminobutyric acid (GABA) Synaptic connections between the end and the opioid μ receptor neurons. The results showed that about one-third of MOR-positive dendrites and cell bodies in the superficial layer of the posterior horn did not form synaptic connections with GABA-positive cells.