Points of view concerning forebrain morphology in lower vertebrates
Points of view concerning forebrain morphology in lower vertebrates
复制标题
DOI：
10.1002/cne.900340502
复制
发表时间：
1922-10-01
影响因子：
2.5
通讯作者：
Holmgren, N
中科院分区：
文献类型：
--
作者：
Holmgren, N
几年来，我一直忙于研究不同脊椎动物的大脑结构。我非常注意前脑的形态，在我看来，以前的工人对它的理解还不够充分。因此，我对粘胶鱼和硬骨鱼的这部分大脑进行了广泛的研究。此外,。我研究过岩目动物、selachians、全头类动物、类目动物、两栖动物、爬行动物和哺乳动物，虽然这些研究还没有发表，但是提供了许多关于前脑形态学的有价值的观点，其中一些是本研究所在我的指导下专门研究的课题。在脊椎动物中，有两种不同类型的前脑，外翻的和倒转的。这一现象仅限于多鳍目、类鱼和硬骨鱼，而这一现象则适用于所有其他脊椎动物。这两种类型的本质区别在于，前者的前脑背壁是向外弯曲的，而后者的背壁是向内弯曲的，从而形成脑顶。在外翻的前脑中，顶部是由大大扩大的端部组成的。
For some years I have been occupied with investigations upon the brain structure of different vertebrates. I have paid much attention to the morphology of the forebrain, which seems to me not sufficiently understood by former workers. I have thus made extensive studies on this part of the brain in Myxine and bony fishes. In addition,. I have made studies on Petromyzon, selachians, holocephalians, ganoids, amphibians, reptiles, and mammals, studies which, however, have not yet resuIted in publications, but have nevertheless given many valuable points of view concerning forebrain morphology, some of which are subjects of special investigations at this institute and under my direction.In vertebrates there are two different types of forebrain present, the everted and the inverted. The everted is confined to Polypterus, ganoids, and teleosts, the inverted to all other vertebrates. The essential difference between these two types is, that in the former the dorsal walls of the forebrain are bent outward, while in the latter they are bent inward so as to form the roof of the brain. In the everted forebrain the roof is made up by the greatly expanded tela.