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镇痛是针麻的主要内容之一,大脑皮层感觉区、丘脑是传统的“痛觉中枢”。近年来提出了有关痛觉生理的一些新理论,有的作者提出尾核也与痛觉有关。可以设想,针麻时中枢神经系统,尤其“痛觉中枢”的机能活动将会发生改变,与中枢神经系统机能活动有关的化学递质的含量也将有变化。参与中枢神经系统机能活动的化学递质品种甚多,现在认为:
Analgesic acupuncture anesthesia is one of the main content of the cerebral cortex sensory area, the thalamus is the traditional “pain central.” In recent years, some new theories about pain physiology have been put forward. Some authors propose that caudate nucleus is also related to pain sensation. It is conceivable that functional activities of the central nervous system, especially “pain central”, will change when acupuncture at anesthesia and the content of chemical neurotransmitters associated with central nervous system functional activity will also change. There are many chemical neurotransmitters involved in central nervous system functional activity and now consider: