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用抗Ｐ物质和降钙素基因相关肽免疫组织化学技术观察了大鼠孤束核内Ｐ物质和降钙素基因相关肽阳性神经元的分布．结果，在孤束核的尾侧部至嘴侧部全区内见到中型细胞，呈圆形、卵圆形或梭形的Ｐ物质阳性神经元，在最后区水平孤束核的连合核和内侧核内Ｐ物质阳性神经元较多，其它亚核内亦见到Ｐ物质阳性神经元，在孤束核的背侧周边区亦见到较多的Ｐ物质阳性神经元，降钙素基因相关肽阳性神经元多分布于最后区水平孤束核的连合核和内侧核内，亦分布于孤束核的背侧周边区．
The anti-substance P and calcitonin gene-related peptide immunohistochemistry were used to observe the distribution of substance P and calcitonin gene-related peptide-positive neurons in the nucleus tractus solitarius in rats. As a result, medium-sized cells were seen in the entire area from the caudal to the solitary portion of the nucleus tractus solitarius, showing round, oval or fusiform substance P-positive neurons. At the level of the nucleus, There were more P substance positive neurons in the medial nucleus and P substance positive neurons in other subnucleuses. More P substance positive neurons were seen in the dorsal margins of nucleus tractus solitarius. The calcitonin gene Relevant peptide-positive neurons were distributed in the commissural nucleus and medial nucleus of solitary nucleus at the level of the last area, and also distributed in the dorsal peripheral area of nucleus tractus solitarius.