摘要
在光镜下观察北京鸭脑的连续切片。并将 HRP 注入食管、胃、心脏和脊髓,逆向追踪迷走神经背核传出神经元在核内的定位。北京鸭迷走神经背核位于延髓呈纵向细胞柱,可明显地分为背侧部和腹侧部。腹侧部含淡染小细胞,多为梭形,细胞直径18～20 μm。背侧部内含中小型细胞,混合排列,直径20～35 μm;在闩前的后段还出现大细胞,直径35～40 μm。在二部的外侧有一小部为外侧部。本文提出按部位划分亚核的原则以利应用。共分为尾侧亚核、吻侧亚核、闩前背侧后核、闩前腹侧后核、闩前外侧后核、闩前背侧前核、闩前腹侧前核、闩前外侧前核共8个亚核。用 HRP 法追踪投射到食管各段、腺胃和肌胃薄肌与厚肌、心脏以及脊髓的神经元,肯定了北京鸭迷走神经背核投射至以上各外周器官的神经元在核内有一定的定位区域。
The dorsal nuclei of vagus of Pekin duck were observed in serial transverse sections and longitudinal sections.Location of the original neurons of peripheral fibers in the dorsal nuclei of vagus were traced by injecting HRP to esophagus,stomach,heart and spinal cord.We described the morphology, cytoarchitecture and the subnuclei and location of neurons of efferent fibers of dorsal nuclei of vagus.Then discussed the standards of subdivision according to the positons of dorsal nuclei of vagus.
关键词
北京鸭
迷走神经背核
解剖
Pekin duck
dorsal nuclei of vagus
efferent neurons
HRP method
