Kretz R, Rager G
Department of Anatomy, University of Fribourg, Switzerland.
Exp Brain Res. 1990;82(2):271-8. doi: 10.1007/BF00231247.
WGA-HRP injections were placed into area 17 close to the border with area 18 of Tupaia belangeri in order to study the callosal connections of the striate area in this animal. Most callosal neurons were found in the striate cortex (57.6-86.9%), some in the extrastriate area 18 (10.6-28.1%), and a few in even more temporal regions (2.5-14.3%). Concerning only the area 17, reciprocal homotopic connections could be observed as a strip along the area 17/18 border. Additionally, heterotopic callosal connections could be seen in regions representing the binocular visual field, especially the lower part. The area 17 cells were mostly located in the supragranular layers II and III (94.1-97.2%). But neurons could also be found in the infragranular layers, especially layer VI (2.6-5.2%) and in layer IV (0.2-1.1%). Homotopic projections were mostly seen in layers IIIc and V. The majority of the supragranular and infragranular neurons are pyramidal cells. However, a newly defined subpopulation of neurons, most probably stellate cells, were discovered forming a band in sublayer IIIc, very close to the layer III/IV border.
将WGA-HRP注射到树鼩靠近18区边界的17区，以研究该动物纹状区的胼胝体连接。大多数胼胝体神经元位于纹状皮层（57.6 - 86.9%），一些位于纹外18区（10.6 - 28.1%），少数位于更靠颞侧的区域（2.5 - 14.3%）。仅就17区而言，沿17/18区边界可观察到相互的同位连接呈带状。此外，在代表双眼视野的区域，尤其是下部，可看到异位胼胝体连接。17区的细胞大多位于颗粒上层II和III（94.1 - 97.2%）。但在颗粒下层也可发现神经元，尤其是VI层（2.6 - 5.2%）和IV层（0.2 - 1.1%）。同位投射大多见于IIIc层和V层。大多数颗粒上层和颗粒下层神经元是锥体细胞。然而，发现了一个新定义的神经元亚群，很可能是星状细胞，在IIIc亚层形成一条带，非常靠近III/IV层边界。
