Hereć S, Milart Z
Pol Arch Weter. 1975;17(4):731-6.
The objective of the work was to determine: a) the presence of the nucleus cervicalis lateralis in the sheep, b) the extent of this nucleus in the spinal cord and medulla oblongata, and c)the number and size of its cells. The histological method of staining the nerve tissue with methylene blue according to Nissl was employed. The nucleus cervicalis lateralis of the sheep is situated in the lateral funiculus, in the caudal part of the medulla oblongata and in the first three cervical segments of the spinal cord. The total number of cells making up the studied nucleus was 1629 in sheep I, 678 in sheep II, and 732 in sheep III. The average size of the cells ranged between 18.0 and 28.0 mu. In comparison with the same nucleus examined in other animals, that of the sheep shows a number of cell-free areas. It is composed of a very small number of cells, whose average diameter is small. These characteristics make it possible to regard the nucleus cervicalis lateralis in the sheep as a rudimentary structure.
a）绵羊中是否存在外侧颈核；b）该核在脊髓和延髓中的范围；c）其细胞的数量和大小。采用了根据尼斯尔（Nissl）法用亚甲蓝对神经组织进行染色的组织学方法。绵羊的外侧颈核位于外侧索，在延髓的尾部以及脊髓的前三个颈段。构成所研究核的细胞总数在绵羊I中为1629个，在绵羊II中为678个，在绵羊III中为732个。细胞的平均大小在18.0至28.0微米之间。与在其他动物中检查的同一核相比，绵羊的该核显示出一些无细胞区域。它由极少数细胞组成，其平均直径较小。这些特征使得可以将绵羊的外侧颈核视为一种原始结构。
