大鼠胸腺传入纤维在中枢内的跨节投射——CB-HRP法

本文将CB-HRP注入大鼠胸腺,研究了标记细胞在感觉神经节的分布及初级感觉终末在脊髓、脑干中的投射。结果表明:1.在双侧迷走神经结状节中有标记细胞;2.在C_1-T_5段双侧脊神经节中有标记细胞,推测这些标记细胞可能随交感神经传入,其中C_3-C_4段的投射可能随膈神经传入;3.脊髓中的标记终末,见于C_1-C_8节段,主要分布在Ⅰ层内;4.脑干中的标记终末,主要见于双侧孤束核的全长及连合核中。在疑核标记的节前神经元附近有的也可见终末分布,提示胸腺的一级传入与传出神经元间可能存在直接联系。

CENTRAL PROJECTION OF THE AFFERENT FIBERS OF THE THYMUS OF RAT

Central projection of sensory fibers of the thymus of the rat was traced with CB-HRP injected into the thymus. The labelled cells were found in the nodose ganglia and spinal ganglia (C1-T5) bilaterally. The labelled terminals were found in the nucleus of solitary tract, the commissural nucleus and the lamina I of the spinal gray matter bilaterally. Some of the sensory terminals were seen around the parasympathetic preganglionic neurons in the nucleus ambiguus.