ROHON-BEARD CELLS IN FROG DEVELOPMENT - A STUDY OF TEMPORAL AND SPATIAL CHANGES IN A TRANSIENT CELL-POPULATION
ROHON-BEARD CELLS IN FROG DEVELOPMENT - A STUDY OF TEMPORAL AND SPATIAL CHANGES IN A TRANSIENT CELL-POPULATION
复制标题
DOI：
10.1002/cne.902030110
复制
发表时间：
1981-01-01
影响因子：
2.5
通讯作者：
PORTER, RA
中科院分区：
文献类型：
--
作者：
EICHLER, VB;PORTER, RA
通过组织学研究了幼虫和新变态库蚊脊髓中Rohon-Beard细胞的空间分布和时间消失情况，为进一步研究这一特殊细胞类型提供依据。.apprx.的最大数目。在i幼虫期，在库蚊脊髓内已分化出250个Rohon-Beard神经元，这些细胞大部分位于脊髓的头端，在脊髓前四分之一和第二四分之一的边界附近发现大量细胞。在第三和第四季度发现的细胞较少。在幼虫时期，这些细胞逐渐退化，到第XXV期，即变态高潮的完成，没有正常出现的罗恩-比尔德细胞存在。罗洪-比尔德细胞的退化并不随着发育向头尾方向发展，而是在研究的每个阶段，在脊髓的每个季度中，罗洪-比尔德细胞的损失似乎几乎是相等的。在孳生过程中，所有的罗洪-比尔德细胞都位于背侧，靠近中线。在所有年龄段和脊髓的每个部位，这些细胞的数量没有显著的双边差异。
The spatial distribution and temporal disappearance of Rohon-Beard cells in the spinal cords of larval and newly metamorphosed R. pipiens were studied histologically to provide a basis for further research dealing with this particular cell type. A maximum number of .apprx. 250 Rohon-Beard neurons have differentiated within the spinal cord of R. pipiens by larval stage I. The majority of these cells are located in the cephalic end of the spinal cord, with a large number found near the boundary of the anterior quarter and the 2nd quarter of the spinal cord. Fewer cells are found in the 3rd and 4th quarters. There is a gradual degeneration of these cells during larval life so that by stage XXV, which is the completion of the metamorphic climax, there are no normally appearing Rohn-Beard cells present. Degeneration of the Rohon-Beard cells does not progress cephalo-caudally with development, but rather there appears to be a nearly equal proportional loss of Rohon-Beard cells in each quarter of the spinal cord at each of the stages studied. All Rohon-Beard cells present during larval development of R. pipiens are located in a dorsal position, close to the midline. At all ages and in each quarter of the spinal cord there are no significant bilateral differences in number of these cells.