The nucleus glomerulosus (NG) in paracanthopterygian and acanthopterygian teleost fishes receives afferents from neurons of the nucleus corticalis (NC), whose dendrites extend to the layers, stratum fibrosum et griseum superficiale (SFGS) and stratum griseum centrale (SGC), of the tectum opticum. A re-examination in this study revealed, by means of tracer experiments using biotinylated dextran amine, a separation among both tectal layers, portions of the NC, and target areas in a laminated type of the NG in the South American pufferfish, Colomesus asellus. Neurons of the lateral part of the NC send their dendrites to the SFGS and project to an area located dorsolaterally and centrally in the NG. In contrast, dendrites from neurons of the medial part of the NC run to the SGC, and projections from these neurons terminate in the NG in an area extending from dorsomedial to ventrolateral in the outer portion. Therefore, these two areas in the NG receive input from different sources. The NG in the visual system of tetraodontids may be involved in higher cognitive functions requiring much energy, becoming apparent by its very high level of cytochrome c oxidase activity.

中文翻译：

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南美河豚（Colomesus asellus）肾小球核的两个不同区域

副棘鳍总目和棘鳍总目硬骨鱼类的肾小球核 (NG) 接受来自皮层核 (NC) 神经元的传入，其树突延伸到顶盖的纤维层和灰色浅层 (SFGS) 和灰色中央层 (SGC)视镜。本研究的重新检查表明，通过使用生物素化葡聚糖胺的示踪实验，在南美河豚的层压型 NG 中，两个顶盖层、部分 NC 和目标区域之间的分离，巨蜥。NC 外侧部分的神经元将它们的树突发送到 SFGS 并投射到位于 NG 背外侧和中央的区域。相比之下，来自 NC 内侧部分神经元的树突运行到 SGC，并且来自这些神经元的投射终止于 NG，在外部从背内侧延伸到腹外侧的区域。因此，NG 中的这两个区域接收来自不同来源的输入。四齿动物视觉系统中的 NG 可能涉及需要大量能量的高级认知功能，其非常高水平的细胞色素 c 氧化酶活性变得明显。