Takada M, Itoh K, Yasui Y, Sugimoto T, Mizuno N
Exp Brain Res. 1985;60(2):385-96. doi: 10.1007/BF00235934.
Projections from the posterior thalamic regions to the striatum were studied in the cat by the anterograde tracing method after injecting wheat germ agglutinin-horseradish peroxidase conjugate (WGA-HRP) into the caudalmost regions of the lateroposterior thalamic nucleus (caudal LP), suprageniculate nucleus (Sg) and magnocellular division of the medial geniculate nucleus (MGm). The results were further confirmed by the retrograde tracing method after injecting WGA-HRP into the regions of the caudate nucleus (Cd) and putamen (Put) where afferent fibers from the caudal LP, Sg and MGm were distributed. Fibers from the MGm, Sg or caudal LP were distributed mainly in the medial, middle or lateral part of the caudal half of the putamen (caudal Put), respectively. Although there was a considerable overlap, thalamostriatal fibers from the caudal LP terminated more caudally than those from the MGm. On the other hand, thalamocaudate fibers from the MGm, Sg and lateral part of the caudal LP overlapped with each other in the ventrolateral part of the caudal half of the caudate nucleus (caudal Cd). Fibers from the medial part of the caudal LP were distributed in the ventral part of the caudal Cd. In the superior colliculus (SC) of the cats with WGA-HRP injections in the caudal LP, retrogradely labeled neuronal cell bodies were mainly seen ipsilaterally in the superficial SC layer, and simultaneously, anterogradely labeled axon terminals were observed in the striatum. On the other hand, when WGA-HRP was injected into the Sg or MGm, labeled SC neurons were mainly located in the intermediate and deep SC layers. Thus, ascending impulses from the superficial SC layer may possibly be conveyed ipsilaterally via the caudal LP to the ventral and ventrolateral parts of the caudal Cd and the lateral part of the caudal Put, whereas those from the intermediate and deep SC layers may be relayed via the Sg and/or MGm to the ventrolateral part of the caudal Cd and the middle and medial parts of the caudal Put.
通过将小麦胚芽凝集素 - 辣根过氧化物酶复合物（WGA - HRP）注入猫后外侧丘脑核（尾侧LP）、上膝状体核（Sg）和内侧膝状体核大细胞部（MGm）的最尾端区域，采用顺行追踪法研究了丘脑后部区域到纹状体的投射。在将WGA - HRP注入尾状核（Cd）和壳核（Put）中来自尾侧LP、Sg和MGm的传入纤维分布区域后，通过逆行追踪法进一步证实了结果。来自MGm、Sg或尾侧LP的纤维分别主要分布在壳核尾侧半（尾侧Put）的内侧、中间或外侧部分。尽管存在相当大的重叠，但来自尾侧LP的丘脑纹状体纤维比来自MGm的纤维终止位置更靠尾侧。另一方面，来自MGm、Sg和尾侧LP外侧部分的丘脑尾状核纤维在尾状核尾侧半（尾侧Cd）的腹外侧部分相互重叠。来自尾侧LP内侧部分的纤维分布在尾侧Cd的腹侧部分。在尾侧LP注射WGA - HRP的猫的上丘（SC）中，逆行标记的神经元细胞体主要在同侧的上丘浅层中看到，同时，在纹状体中观察到顺行标记的轴突终末。另一方面，当将WGA - HRP注入Sg或MGm时，标记的上丘神经元主要位于上丘中间层和深层。因此，来自上丘浅层的上行冲动可能通过尾侧LP同侧地传递到尾侧Cd的腹侧和腹外侧部分以及尾侧Put的外侧部分，而来自中间层和深层的冲动可能通过Sg和/或MGm中继到尾侧Cd的腹外侧部分以及尾侧Put的中间和内侧部分。
