缝隙连接(Gap Junction,GJ)是细胞连接的一种,Revel与Karnovsky(1967),曾描述了细胞之间具有这种结构。在两个神经细胞之间的GJ就是电突触。它多见于无脊椎动物,脊椎动物也有,在哺乳动物中见于前庭外侧核及三叉神经核。近年来,在哺乳动物的脊髓、海马、下丘脑、嗅脑及视网膜的感光细胞、水平细胞之间发现有GJ,这是一个值得注意的新课题。因为神经细胞之间的信息传递不仅在化学性突触处进行,而且也可能通过直接的双向突触进 Gap Junction (GJ) is a type of cell junction, and Revel and Karnovsky (1967) have described this structure between cells. The GJ between two nerve cells is an electrical synapse. It is more common in invertebrates, vertebrates are also found in mammals in the lateral vestibular nucleus and the trigeminal nucleus. In recent years, GJ has been found in mammalian spinal cord, hippocampus, hypothalamus, olfactory brain and retinal photoreceptor cells and horizontal cells. This is a new topic worth noting. Because the transmission of information between nerve cells is not only at chemical synapses but also through direct bidirectional synaptic injections