Ojima H, Murakami K, Kishi K
Neural Systems Laboratory, FRP, RIKEN, Saitama, Japan.
Neurosci Lett. 1996 Apr 12;208(1):57-60. doi: 10.1016/0304-3940(96)12538-6.
Terminal morphology of corticothalamic fibers originating from cat area 17 was examined. Injections of an anterograde axonal tracer, phaseolus vulgaris leucoagglutinin (PHA-L), in area 17 resulted in labeling of small boutons in the dorsal lateral geniculate, perigeniculate, and thalamic reticular nuclei and in labeling of large boutons in the lateral nucleus of lateral posterior-pulvinar, ventral lateral geniculate, and pulvinar nuclei. Since it is well known that the dorsal geniculate nucleus is a major corticothalamic target for layer 6 pyramids and the lateral posterior-pulvinar complex is that for layer 5 pyramids, the findings indicate that layer 5 pyramids in cat area 17 project axons ending with large boutons, while layer 6 pyramids project those ending with small boutons.
对源自猫17区的皮质丘脑纤维的终末形态进行了检查。在17区注射顺行轴突示踪剂菜豆白细胞凝集素（PHA-L），导致背外侧膝状体、膝周和丘脑网状核中的小终扣被标记，以及外侧后丘脑-枕叶复合体、腹外侧膝状体和枕叶核中的大终扣被标记。由于众所周知，背侧膝状体核是6层锥体神经元的主要皮质丘脑投射靶点，而外侧后丘脑复合体是5层锥体神经元的投射靶点，这些发现表明，猫17区的5层锥体神经元投射的轴突以大终扣结束，而6层锥体神经元投射的轴突以小终扣结束。
