COMMISSURAL CONNECTIONS OF THE HIPPOCAMPAL REGION IN THE RAT, WITH SPECIAL REFERENCE TO THEIR MODE OF TERMINATION
COMMISSURAL CONNECTIONS OF THE HIPPOCAMPAL REGION IN THE RAT, WITH SPECIAL REFERENCE TO THEIR MODE OF TERMINATION
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DOI：
10.1002/cne.901050305
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发表时间：
1956-01-01
影响因子：
2.5
通讯作者：
BLACKSTAD, TW
中科院分区：
文献类型：
--
作者：
BLACKSTAD, TW
本文对大鼠到达内嗅区、下托旁、前下托、压后区（29 e）、下托、海马和齿状筋膜的交叉纤维的终止方式进行了研究。通过破坏纤维的起源部位，然后在三四天内用还原银浸渍（Nauta的原始技术）显示退化的纤维，特别是它们的末端部分，使纤维可见。纤维的确切分布，以及在某种程度上它们的起源，已经被绘制出来。本文介绍了研究区域的正常解剖结构。这些纤维的末端分支并不是在大脑皮层的所有层中扩散，而是在大脑皮层的特定层次上，在所研究的每个区域都不同。相邻地区特有的分布模式之间的过渡是尖锐的，并且与建筑学基础上确定的区域间界限完全一致。在海马区已经证实了一些同位和异位的半球间连接。一些理论上可能的联系已经被证明是不存在的。只有两个子字段，在该地区的研究，收到很少或没有半球间的纤维。
A study has been made of the mode of termination of the decussating fibers which in rat reach the entorhinal area, the parasubiculum, the presubiculum, one of the retrosplenial areas (29 e), the subiculum, the hippocampus, and the fascia dentata. The fibers were made visible by destruction of their site of origin, followed in three or four days by impregnation with reduced silver (Nauta''s original technic) showing up the degenerating fibers and, particularly well, their terminal parts. The exact distribution of the fibers, and to some extent their origin, has been mapped out. An introductory consideration of the normal anatomy of the regions studied is included in the paper. The terminal ramifications of these fibers turned out to end not diffusely through all layers of the cortex, but at definite levels of it exclusively, different in each of the areas studied. The transitions between the patterns of distribution specific to neighboring areas is sharp and coincides exactly with the interareal limits as determined on an architectonic basis. Some homotopic and heterotopic interhemispherical connections have been demonstrated in the hippocampal region. Several theoretically possible connections have been shown to be nonexistent. Two subfields only, in the region studied, receive few or no interhemispherical fibers.