Arends J J, Wild J M, Zeigler H P
Biopsychology Program, Hunter College (CUNY), New York 10021.
J Comp Neurol. 1988 Dec 15;278(3):405-29. doi: 10.1002/cne.902780310.
With the aid of autoradiographic and histochemical (WGA-HRP) tracing techniques, the projections of the nucleus of the tractus solitarius (nTS) in the pigeon have been delineated and related to the viscerotopic organization of the nucleus. As in mammals, nTS projects to both brainstem and forebrain structures. At medullary levels, projections were seen to nTS itself, to the dorsal motor nucleus of the vagus and to the subjacent and more ventral reticular formation. There is a substantial projection to the parabrachial nuclear complex with terminations in all its subnuclei and minor projections to locus coeruleus and several mesencephalic areas, including the ventral area of Tsai, the nucleus of the ascending brachium conjunctivum, and the compact portion of the tegmental pedunculopontine nucleus. At diencephalic levels, projections to the hypothalamus (magnocellular periventricular nucleus, stratum cellulare internum and externum) and dorsal thalamus were seen. Terminal fields within the basal telencephalon included the nucleus of the pallial commissure, the bed nucleus of the stria terminalis, and the nucleus accumbens. The organization of nTS projections in pigeons is correlated with the pattern of inputs to specific nTS subnuclei. Lateral tier subnuclei receiving cardiovascular and pulmonary inputs project upon the ventrolateral reticular formation and the ventrolateral parabrachial complex. Medial tier subnuclei receiving gustatory and gastrointestinal inputs project upon dorsal and medial parabrachial nuclei. Transparabrachial projections arise from nTS subnuclei receiving little or no primary input from the viscera.
借助放射自显影和组织化学（WGA-HRP）追踪技术，已描绘出鸽孤束核（nTS）的投射，并将其与该核的内脏定位组织相关联。与哺乳动物一样，nTS投射到脑干和前脑结构。在延髓水平，可见到nTS自身、迷走神经背运动核以及其下方和更腹侧的网状结构的投射。有大量投射到臂旁核复合体，其所有亚核均有终末，还有少量投射到蓝斑和几个中脑区域，包括蔡氏腹侧区、结合臂升支核以及被盖脚桥核的致密部。在间脑水平，可见到投射到下丘脑（室周大细胞核、细胞内和细胞外层）和背侧丘脑。端脑基底部的终末区域包括皮质连合核、终纹床核和伏隔核。鸽nTS投射的组织与特定nTS亚核的输入模式相关。接受心血管和肺部输入的外侧层亚核投射到腹外侧网状结构和腹外侧臂旁复合体。接受味觉和胃肠道输入的内侧层亚核投射到背侧和内侧臂旁核。跨臂旁投射起源于几乎没有或没有来自内脏的主要输入的nTS亚核。
