胆囊传出神经的脑干起始神经元

ORIGINATING NEURONS OF THE EFFERENT NERVES OF GALL BLADDER IN THE BRAIN STEM IN THE DOG WITH THE CT-HRP MET HOD

幼狗10只,将CT—HRP注入胆囊壁,在脑干发现:1、迷走神经背核中标记细胞分布干除吻、尾侧外的该核全长,闩上2mm到闩下1mm最为密集,占总标记细胞的75.93％。在核的横切而上,自尾侧开始,标记细胞在核的内侧和前缘,继之在核的前份近向排列,稍上,随该核由横位移行为斜位,标记细胞也随之成斜位。

In order to explore nervous dis tributive regularity of gall bladder the authors studied originating neurons of the efferent nerves of ga- ll bladderin the brain stem with t- he GT-HRP method. The experiment method are: (1)CT-HRP(20-40ul) injected into the wall of gau bla dder of the dogs(10 young dogs); (2) after survival period of 5-7 days, the dogs were transcardially perfu- sed and fixed; (3)the brain Stem w- as dissected; (4)the sections were pr- ocessed using The T. M. B Technique of Mesulam. The results showed that Iarge number of labeled cells appeared in the dorsal motor nucleus of the va- gus nerve(DNV) on both side S thr- oughout its whole length, except the very rosral and caudal of it. The l- abeled cells were the most numerous in the middle Part of the nucleus at levels of obex from above the obex 2mm to below the obex 1mm, 75.93％ of the total labeled cells. The distribution of the labeled cells indicated certain, localization. characteristics. Those in the caudal part of the nu- cleus occupied the anterior and in- terior margin, then the labeled ce- lls arranged nearly transverse pos- ition. in the front part of the nuc- leus. The labeled cells arranged in a slant position when the DNV Ioca- ted from transverse position to sl- ant position the upper part aronud opening part of the central canal. while in the rostral part, the labe- led cells were smaller in unmber a- nd showed no definite localization, In the CNV, the neurit of the lab- eled cells near the bottom part of the 4th ventricle extended in to thd ependyma of the 4th ventricle. In ad- dition, a few number of the labeled cells appeared in the nucleus ambi- guus and nucleus reticularis latera- lis.