神经递质是神经细胞对到达的动作电位起反应时从末梢释放的微量化学物质。中枢神经递质的种类很多,有资料表明:被公认的神经递质已达数十种,或许可能多达到100种以上,其中神经肽也超过30种。早在20世纪70年代,人类发现阿片受体和内源性阿片肽后,近20多年来国内外在神经肽与脑损 Neurotransmitters are tiny amounts of chemical released from the distal nerve cells in response to an arriving action potential. There are many kinds of neurotransmitters in the central nervous system. Some data show that there are dozens of known neurotransmitters, perhaps up to more than 100, of which more than 30 are neuropeptides. As early as the 1970s, after human discovery of opioid receptors and endogenous opioid peptides, neuropeptides and brain damage