Berk M L
J Comp Neurol. 1987 Jun 1;260(1):140-56. doi: 10.1002/cne.902600111.
The dorsal vagal complex is composed of the nucleus tractus solitarii (Nts) and the dorsal motor nucleus of the vagus (DMN X). In the pigeon, these nuclei are composed of cytoarchitectonically well-defined subnuclear groups, which have connections that are partially segregated to specific organs (Katz and Karten: J. Comp. Neurol. 218:42-73, '83b, J. Comp. Neurol. 242:397-414, '85). The present study sought to determine whether forebrain afferents to Nts-DMN X are differentially distributed to specific subnuclei and thereby modulate the functions of specific organs. Forebrain afferents to the dorsal vagal complex were determined by retrograde tracing techniques. Labeled perikarya were found in the bed nucleus of the stria terminalis (BNST), ventral paleostriatum, and stratum cellulare externum (SCE) of the lateral hypothalamus, and in the medial hypothalamus, nucleus periventricularis magnocellularis (PVM), which is the avian homologue to a portion of the mammalian paraventricular nucleus. The pattern of axonal distribution to Nts-DMN X subnuclei from the BNST-ventral paleostriatum and SCE were investigated by anterograde tracing techniques. These experiments revealed axonal projections distributed to specific Nts-DMN X subnuclei. However, there is a high degree of overlap of the axonal projections to Nts-DMN X subnuclei from BNST-ventral paleostriatum and SCE, as well as from PVM (Berk and Finkelstein: J. Comp. Neurol. 220:127-136, '83). Labeled fibers from BNST-ventral paleostriatum and SCE project heavily to Nts subnuclei medialis superficialis, lateralis dorsalis, and medialis ventralis and to DMN X subnucleus ventralis parvicellularis. Fewer labeled fibers were found in Nts subnucleus medialis intermedius and extremely sparse labeling was found in Nts subnucleus medialis dorsalis. The Nts and DMN X subnuclei that receive forebrain projections also have peripheral connections with the aortic nerve, crop, esophagus, glandular stomach, and caudal abdominal organs. Thus, the forebrain could modulate the functions of these segments of the cardiovascular and digestive systems.
迷走神经背侧复合体由孤束核（Nts）和迷走神经背运动核（DMN X）组成。在鸽子中，这些核由细胞构筑学上定义明确的亚核群组成，它们的连接部分地分隔到特定器官（Katz和Karten：《比较神经学杂志》218:42 - 73，'83b，《比较神经学杂志》242:397 - 414，'85）。本研究旨在确定前脑向Nts - DMN X的传入纤维是否差异分布到特定亚核，从而调节特定器官的功能。通过逆行追踪技术确定了前脑向迷走神经背侧复合体的传入纤维。在终纹床核（BNST）、腹侧古纹状体、下丘脑外侧的细胞外层（SCE）以及下丘脑内侧的室旁大细胞核（PVM）中发现了标记的胞体，PVM是哺乳动物室旁核一部分的鸟类同源物。通过顺行追踪技术研究了从BNST - 腹侧古纹状体和SCE到Nts - DMN X亚核的轴突分布模式。这些实验揭示了轴突投射分布到特定的Nts - DMN X亚核。然而，从BNST - 腹侧古纹状体和SCE以及从PVM到Nts - DMN X亚核的轴突投射存在高度重叠（Berk和Finkelstein：《比较神经学杂志》220:127 - 136，'83）。来自BNST - 腹侧古纹状体和SCE的标记纤维大量投射到Nts的浅内侧亚核、背外侧亚核和腹内侧亚核以及DMN X的腹侧小细胞亚核。在Nts的中间内侧亚核中发现的标记纤维较少，而在Nts的背内侧亚核中发现的标记极其稀疏。接受前脑投射的Nts和DMN X亚核也与主动脉神经、嗉囊、食管、腺胃和腹部尾部器官有外周连接。因此，前脑可以调节心血管和消化系统这些节段的功能。
