There has been a surge of interest in the structure and function of the mammalian claustrum in recent years. However, most anatomical and physiological studies treat the claustrum as a relatively homogenous structure. Relatively little attention has been directed toward possible compartmentalization of the claustrum complex into anatomical subdivisions, and how this compartmentalization is reflected in claustrum connections with other brain structures. In this study, we examined the cyto- and myelo-architecture of the claustrum of the common marmoset (Callithrix jacchus), to determine whether the claustrum contains internal anatomical structures or compartments, which could facilitate studies focused on understanding its role in brain function. NeuN, Nissl, calbindin, parvalbumin, and myelin-stained sections from eight adult marmosets were studied using light microscopy and serial reconstruction to identify potential internal compartments. Ultra high resolution (9.4T) post-mortem magnetic resonance imaging was employed to identify tractographic differences between identified claustrum subcompartments by diffusion-weighted tractography. Our results indicate that the classically defined marmoset claustrum includes at least two major subdivisions, which correspond to the dorsal endopiriform and insular claustrum nuclei, as described in other species, and that the dorsal endopiriform nucleus (DEnD) contains architecturally distinct compartments. Furthermore, the dorsal subdivision of the DEnD is tractographically distinguishable from the insular claustrum with respect to cortical connections.

中文翻译：

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mo猴子弹复合体的内部细分：通过骨髓结构特征和高场强成像进行识别。

近年来，对哺乳动物锁骨的结构和功能的兴趣激增。但是，大多数解剖学和生理学研究都把锁骨当作相对同质的结构。相对较少的注意力集中在将锁骨复合物划分为解剖细分，以及如何在锁骨与其他大脑结构的连接中反映这种分隔。在这项研究中，我们检查了普通mar猴（Callithrix jacchus）的锁骨的细胞和骨髓结构，以确定锁骨是否包含内部解剖结构或隔室，这可能有助于专注于了解其在脑功能中作用的研究。NeuN，Nissl，钙结合蛋白，小白蛋白，使用光学显微镜和连续重建研究了八个成年mos猴的髓鞘和髓鞘染色切片，以鉴定潜在的内部区室。采用超高分辨率（9.4T）验尸磁共振成像，通过扩散加权成像来识别已识别的锁骨子房之间的成像差异。我们的结果表明，经典定义的mar猴锁骨囊至少包括两个主要细分，分别对应于其他物种中描述的背侧腹膜状和岛状锁骨核，并且背侧腹膜状核（DEnD）包含结构上不同的区室。此外，就皮层连接而言，DenD的背侧细分在皮层学上可与岛状锁骨区分开。