作者指出,有文献认为存在两种疼痛,第一种疼痛迅速传导到意识、很局限,但不持久;第二种疼痛传导较缓慢、不局限、持续时间较长、在致痛刺激停止后还可持续较久。第一种疼痛是由Aδ纤维传导的,第二种疼痛是由C 纤维传导的。当然,对粗的、低阈值Aβ传入纤维的刺激,如TENS,激活了阻滞伤害性感受器传入到上行轴突的突触前抑制,而针刺或电针刺激激活了Aδ传入纤维(此纤维来自肌肉的牵张感受器)。Melzack 和Wall 1982年提出:激活脑干作用的强刺激对脊髓闸门控制系统和较高突触传递产生抑制,他们称之为“超刺激镇痛”,并 The authors point out that there are literature that there are two kinds of pain, the first quickly transmitted to the consciousness of consciousness, very limited, but not lasting; the second pain conduction slower, not limited, longer duration, after the pain stimulus has stopped Sustainable longer. The first type of pain is mediated by Aδ fibers and the second type is pain-mediated by C fibers. Of course, stimulation of the coarse, low threshold A [beta] afferent fibers, such as TENS, activated the presynaptic arrest that blocks the introduction of nociceptin into the axonal axon, whereas acupuncture or electroacupuncture stimulated A [delta] afferent fibers (This fiber comes from the muscle stretch receptors). Melzack and Wall (1982) suggested that strong stimulation of brain stem activation suppresses spinal gate control and higher synaptic transmission, which they call “suratimulation analgesia” and