早期的研究工作表明,刺激外周皮神经,可在大脑体感皮层表面记录到由初发反应(主反应)、次反应和后发放等成份组成的诱发电位(Somatosensory Evoked Potential,SEP)。但对SEP各成份与外周神经中各类纤维兴奋的关系有不同的看法。有人认为,当β纤维单独兴奋或β和δ纤维同时兴奋时,SEP的各成份无明显的差异,δ纤维很少或根 Early studies have shown that stimulation of the peripheral cutaneous nerve can record Somatosensory Evoked Potential (SEP) composed of primary reaction (primary reaction), secondary reaction and post-delivery on the surface of somatosensory cortex. However, there is a different view on the relationship between SEP components and the excitability of various types of fibers in peripheral nerves. It is believed that there is no significant difference in the components of SEP when β-fiber is excited alone or the β and δ-fibers are excited at the same time, with few or fewer δ-fibers