Manteĭfel' Iu B, D'iachkova L N
Zh Evol Biokhim Fiziol. 1979 Nov-Dec;15(6):602-7.
Distribution of myelinated nervous fibers in the layer 9 of the optic tectum of the frog Rana temporaria has been investigated in normal animals as well as 6--9, 60 and 134 days after contralateral enucleation. Counts were made on long and oriented sections at the screen of electron microscope. Fields of myelinated fibers in the layer 9, visible under light microscopic, are not distinguished by higher density of these fibers and differ from the other parts of sections probably due to some qualitative differences, especially because of parallel orientation of these fibers within a field. In rostral part of the tectum, myelinated fiber density in the most superficial zone of the layer 9 (0--50 millimicrons from the outer surface) is higher as compared with central and caudal parts. After degeneration of myelinated optic fibers, there are many unchanged fibers of this type in the layer 9.
在正常动物以及对侧眼球摘除术后6 - 9天、60天和134天的泽蛙（Rana temporaria）中，研究了视顶盖第9层中有髓神经纤维的分布情况。在电子显微镜屏幕上对长的定向切片进行计数。在光学显微镜下可见的第9层中有髓纤维区域，这些纤维的密度并不更高，并且与切片的其他部分不同，可能是由于一些质量上的差异，特别是因为这些纤维在一个区域内呈平行排列。在顶盖的前部，第9层最表层区域（距外表面0 - 50毫微米）的有髓纤维密度比中部和尾部更高。有髓视神经纤维变性后，第9层中有许多此类未改变的纤维。
