摘要
对从胚胎期第6周到出生前山羊的延髓主要灰质核团发育的组织学变化进行了系统研究。结果表明:(1)第6周山羊胚胎延髓处在组织发生末期和核团形成初期,是其内部核团构建的关键时期。(2)延髓内不同核团中的神经元发育变化在时间上有较大的差异,在同一核团内神经元胞体发育分化在时间上也有差异,即同一核团内较为成熟的神经元胞体的数量由少到多,细胞质内的尼氏小体也存在由少到多,由小变大的过程。(3)延髓灰质结构形成和神经元发育分化的规律:有些结构发生早,而神经元分化较晚,如下橄榄核、三叉神经脊束核和孤束核;有些结构发生略晚,但其中的神经元胞体分化和发育则较早,如舌下神经核、疑核及延髓的网状结构;有些结构发生早,神经元发育也早,如迷走神经背核。
The devalopment of medulla oblongata of prenatal goat was observed by HE method. The results were as follows： （1） It is the sixth week in the embryo of goat that the medulla oblongata was in the last stage of the histogenesis of never tissue and in the starting stage of the forming of gray nucleus. So it is the key-stage of the development of those gray nucleus in medulla oblongata. （2） The increased number of ripe neurons showed that the variationnal rule of different neuron body are identical in the same gray nucleus in spite of the time of their morphological changes were inconsistent in different gray nucleus. In addition, the bigger difference in time of developmental change of neuron among different nucleus was adapt to their structural characteristics. （3） The forming time was incompletely consistency with the developing time of neurons in the medulla oblongata. Some structure occur early and the neurons emerge lately such as the inferior olivary complex, spinal nucleus of trigeminal never and nucleus of solitary tract. Some structure occur lately, and the neurons emerge earlier, such as the hypoglossal nucleus, nucleus ambiguous and reticular formation. Some structure occur early and the neurons also emerge early such as the dorsal nucleus of vagus nerve.
出处
《畜牧兽医学报》
CAS
CSCD
北大核心
2006年第10期1058-1062,共5页
ACTA VETERINARIA ET ZOOTECHNICA SINICA
基金
国家自然科学基金资助项目(39830280)
关键词
发育
延髓
山羊
灰质
核团
development
medulla oblongata
prenatal goat
gray matter
nuclei
