蛤蚧豆状核的结构及其与顶盖前端的纤维联系

The Structure of Nucleus Lentiformis Mesencephali and its Fiber Connection with Anterior Tectum in Lizard Gekko gecko

运用Nissl法和辣根过氧化物酶(horseradish peroxidase,HRP)追踪标记技术,研究蛤蚧(Gekko gecko)豆状核的结构及其与顶盖前端的纤维联系。Nissl染色显示,蛤蚧豆状核细胞大小没有明显差别,由背内侧细胞密集部和腹外侧细胞稀疏部组成。将HRP注射于顶盖前端,结果豆状核背内侧部和腹外侧部分别接受同侧顶盖前端脑室内、外侧纤维的传入,核内标记有浓密的神经丛和大量纤维末梢,并在该核腹外侧部及其邻近区域发现少量大胞体标记细胞。推测豆状核腹外侧部的大胞体细胞及其邻近区域的大胞体细胞可能具有相同的功能,且该核可能形成离顶盖通路和副视系统相联系的交通要道。

Using the Nissl-staining and HRP labeling methods, the structure of pretectal nucleus lentiformis mesencephali （LM） and the fiber connection between LM and anterior tectum were observed in lizard Gekko gecko. The Nissl-staining shows that LM can be divided into a dorsomedial part and a ventrolateral part. The neurons in the former are much denser than those in the latter,but neurons from the two parts are in similar in size. Following HRP injections into the anterior rectum, afferents from medial and lateral of rectum arborize respectively in the dorsomedial and ventrolateral parts of ipsilateral LM, where the bushy nerve cluster and dense terminals are labeled. There are some large labeled neurons in the ventrolateral and the vicinity of LM. We speculate that these large neurons may have the same function and that LM may play an important role in the contact between the tectofugal pathway and the accessory optic system.