Katoh Y Y, Benedek G, Deura S
Department of Anatomy, Fujita Health University School of Medicine, Aichi, Japan.
Brain Res. 1995 Jan 16;669(2):298-302. doi: 10.1016/0006-8993(94)01203-t.
Following WGA-HRP injection into the right suprageniculate nucleus of the cat brain, retrogradely-labeled neurons were found not only in the ipsilateral, but also in the contralateral superior colliculi. After WGA-HRP injection into the unilateral superior colliculus, anterogradely-labeled axon terminals were observed in the bilateral suprageniculate nuclei, and electron microscopic examination revealed that these were large terminals which made asymmetric synaptic contacts with dendrites. When a different kind of fluorescent tracer was injected into each suprageniculate nucleus (Fast blue and Nuclear yellow), double-labeled neurons were observed in the rostral and middle portions of both superior colliculi. These results suggest that there are direct bilateral projections from the superior colliculus to the suprageniculate nuclei, and that some of these projections originate from branching colliculo-suprageniculate axons.
将WGA-HRP注入猫脑右侧上膝核后，不仅在同侧上丘，而且在对侧上丘均发现了逆行标记的神经元。将WGA-HRP注入单侧上丘后，在双侧上膝核中观察到顺行标记的轴突终末，电子显微镜检查显示这些是大型终末，它们与树突形成不对称突触联系。当将不同种类的荧光示踪剂分别注入每个上膝核（快蓝和核黄）时，在双侧上丘的头端和中部观察到了双标记神经元。这些结果表明，从上丘到上膝核存在直接的双侧投射，并且其中一些投射起源于分支的丘-膝状体轴突。
