Iwahori N, Nakamura K, Kameda S
Department of Anatomy, Faculty of Medicine, Nagasaki University, Japan.
Anat Embryol (Berl). 1993 Jun;187(6):523-8. doi: 10.1007/BF00214430.
The courses and terminal patterns of the fasciculus retroflexus (FR) in the interpeduncular nucleus (IP) were studied in the mouse, using the rapid Golgi method. Mainly on the basis of the distribution areas and terminal patterns, the FR fibers are divided into two types. The type 1 FR fibers are coarse in contour and take zigzag courses to distribute throughout the entire rostral half and core region of the caudal IP. In contrast, the type 2 fibers are fine, travel caudally along the lateral boundary of the IP and terminate in the lateral regions of the caudal half, forming a dense fiber plexus. The distribution areas of the type 1 and type 2 fibers are clearly differentiated from each other, from the cytoarchitectural as well as the fibroarchitectural viewpoint. Thus, the type 1 and type 2 FR fibers form different fiber systems in the IP. These results are discussed in the light of the known hodological, histochemical and ultrastructural studies.
采用快速高尔基法，在小鼠中研究了脚间核（IP）内的后屈束（FR）的走行和终末模式。主要基于分布区域和终末模式，FR纤维分为两种类型。1型FR纤维轮廓粗，呈锯齿状走行，分布于整个尾侧IP的嘴侧半和核心区域。相反，2型纤维细，沿IP的外侧边界向尾侧走行，终止于尾侧半的外侧区域，形成密集的纤维丛。从细胞构筑和纤维构筑的角度来看，1型和2型纤维的分布区域明显不同。因此，1型和2型FR纤维在IP中形成不同的纤维系统。结合已知的神经束路、组织化学和超微结构研究对这些结果进行了讨论。
