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近年,人们对交感神经节中的突触传递认识有了很大改观,这里不仅仅存在着以乙酰胆硷(Ach)为递质,N受体参与的兴奋性突触传递,而且还有其他胆硷能性和非胆硷能性的传递方式。 六十年代以来的电生理研究,尤其是细胞内微电极测量表明,刺激交感神经节前纤维,在两栖类和哺乳类动物交感神经节细胞可引起四种性质不同的突触后电位。它们分别是:①快兴奋性突触后电位(f-EPSP),其潜伏期约为数毫秒,持续时间大约20毫秒(单个)。②慢抑制性突触后电位(S-IPSP),潜伏期约数十毫秒,持续时间约3秒。③慢兴
In recent years, people have greatly changed their understanding of synaptic transmission in sympathetic ganglia. There are not only excitatory synaptic transmission involving acetylcholine (Ach), N receptor but also other Cholinergic and non-cholinergic delivery methods. Electrophysiological studies since the 1960s, and especially intracellular microelectrode measurements, have shown that stimulating sympathetic preganglionic fibers causes sympathetic ganglion cells in amphibians and mammals to cause four different post-synaptic potentials. They are: ① fast excitatory postsynaptic potential (f-EPSP), the incubation period of about several milliseconds, the duration of about 20 milliseconds (single). ② slow inhibitory postsynaptic potential (S-IPSP), the incubation period of about tens of milliseconds, duration of about 3 seconds. ③ slow down