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为探讨神经激肽Ｂ受体（ｎｅｕｒｏｋｉｎｉｎｂｒｅｃｅｐｔｏｒ，ＮＫＲ）神经元在大鼠延髓的定位及其在腹膜伤害性传入信息整合中的作用。应用免疫组织化学双重染色方法，显示ＮＫＲ神经元的分布并观察它们对腹膜化学伤害性刺激的Ｆｏｓ表达。结果表明：ＮＫＲ样免疫反应（ＮＫＲ－ＬＩ）神经元主要分布在孤束核（Ｓｏｌ）、延髓腹外侧区（ＶＬＭ）、三叉神经脊束核尾侧亚核（Ｓｐ５Ｃ）浅层和三叉旁核（Ｐａ５）。腹膜伤害性刺激激诱导的Ｆｏｓ表达神经元多数分布在Ｓｏｌ、ＶＬＭ、Ｐａ５和最后区。Ｓｏｌ、ＶＬＭ和Ｐａ５中约３０．１％的ＮＫＲ－ＬＩ神经元同时呈Ｆｏｓ样免疫反应。本研究提示：延髓内上述核团ＮＫＲ－ＬＩ神经元与腹膜伤害性初级传入信息的整合有关，可能参与内脏伤害性刺激的抗伤害性感受（ａｎｔｉ－ｎｏｃｅｃｉｐｔｉｏｎ）过程。
To investigate the localization of neurokinin receptor (NKR) neurons in the medulla oblongata and its role in the integration of nociceptive information in the peritoneum. Immunohistochemical double staining method was used to show the distribution of NKR neurons and to observe their Fos expression on peritoneal chemically noxious stimuli. The results showed that NKR-LI neurons were mainly distributed in Sol, VLM, Sp5C superficial and trigeminal nucleus (Pa5). Peritoneal noxious stimulation-induced Fos expression neurons mostly distributed in Sol, VLM, Pa5 and the last area. Approximately 30.1% of NKR-LI neurons in Sol, VLM and Pa5 were Fos-like immunoreactively. This study suggests that NKR-LI neurons in the medulla oblongata may be involved in the anti-noceciption process of visceral noxious stimuli through the integration of the primary afferent information of peritoneal nociception.