白腰文鸟嗅叶X区的神经回路与P物质的免疫组化定位

用双向神经示踪剂生物素结合的葡聚糖胺和SP-免疫组织化学方法研究白腰文鸟发声学习中枢嗅叶X区的神经投射和P物质在发声中枢及相关核团内的分布。结果表明：X区接受发声与听觉整合中枢上纹状体腹侧尾核(HVC)以及中脑AVT的传入投射，由X区发出的神经纤维投射到丘脑外侧核内侧部(DLM)。在HVC、DLM、新纹状体前部巨细胞核和发声控制中枢古纹状极核内有许多的SP-免疫阳性神经细胞，在X区、中脑背内侧核和延髓舌下神经核等有大量的SP-免疫阳性神经纤维或终末等。提示P物质可能在发声中枢内起重要的生理作用。

Nerve Circuit of Area X and Immunohistochemical Localization of Substance P in Lonchura striata swinhoei

The neural tracer biotionylated dextran amine (BDA) and immunohistochemical methods were used to study neuronal connections in area X of the lobus and the expression of substance P in the striated mannikin. The results indicate that area X receives projections from the high vocal control center (HVC) and ventral area of Tsai (AVT). It projects to the dorsolateral nucleus of the anterior thalamus (DLM). The substance P labeled fibers and neurons were distributed in the area X, the HVC, the DLM , the magnocellular nucleus of the anterior neostriatum (MAN), robus archistriatum (RA), the nucleus dorsalis medialis (DM), the nucleus hypoglossi and the pars tracheosyringealis (nXIIts). The substance P in the vocal control center may play an important role.