The distribution of VIP and SP immunoreactive (VIP IR and SP IR) nerve fibers in human duodenum was studied by using immunohistochemical ABC method.

• 本文采用免疫组织化学ABC法研究血管活性肠肽（VIP）能神经和P物质（SP）能神经在人十二指肠壁内的分布。结果显示：VIP能和SP能神经纤维和神经元均呈棕褐色；