七十年代出现了两种追踪中枢神经核团间联系的新技术。即辣根过氧化物酶(HRP)轴突逆行传送法(简称 HRP法),和放射自显影轴突顺行追踪技术(简称 ARG 法)。HRP 法是将微量的辣根过氧化物酶注入到中枢神经的某一核团,它被神经元轴突 In the seventies there were two new technologies that track the link between the CNS nuclei. Namely horseradish peroxidase (HRP) retrograde axon transmission method (referred to as HRP method), and autoradiography axon tracking technology (referred to as ARG method). HRP method is a trace amount of horseradish peroxidase injected into a certain part of the central nervous system, it was neuronal axons