The thalamic reticular nucleus in reptiles, Caiman crocodilus, shares a number of morphological similarities with its counterpart in mammals. In view of the immunohistochemical properties of this nucleus in mammals and the more recently identified complexity of this neuronal aggregate in Caiman, this nucleus was investigated using a number of antibodies. These results were compared with findings described for other amniotes. The following antibodies gave consistent and reproducible results: polyclonal sheep anti-parvalbumin (PV), monoclonal mouse anti-PV, and polyclonal sheep anti-glutamic acid decarboxylase (GAD). In the transverse plane, this nucleus is divided into two. In each part, a compact group of cells sits on top of the fibers of the forebrain bundle with scattered cells among these fibers. In the lateral forebrain bundle, this neuronal aggregate is represented by the dorsal peduncular nucleus and the perireticular nucleus while, in the medial forebrain bundle, these parts are the interstitial nucleus and the scattered cells in this fiber tract. The results of this study are the following. First, the thalamic reticular nucleus of Caiman contains GAD(+) and PV(+) neurons, which is similar to what has been described in other amniotes. Second, the morphology and distribution of many GAD(+) and PV(+) neurons in the dorsal peduncular and perireticular nuclei are similar and suggest that these neurons colocalize these markers. Third, neurons in the interstitial nucleus and in the medial forebrain bundle are GAD(+) and PV(+). At the caudal pole of the thalamic reticular nucleus, PV immunoreactive cells predominated and avoided the central portion of this nucleus where GAD(+) cells were preferentially located. However, GAD(+) cells were sparse when compared with PV(+) cells. This immunohistochemically different area in the caudal pole is considered to be an area separate from the thalamic reticular nucleus.

中文翻译：

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开曼鳄的丘脑网状核：免疫组织化学染色。

爬行动物中的丘脑网状核（Caiman crocodilus）与其在哺乳动物中的对应物在形态上有许多相似之处。考虑到该核在哺乳动物中的免疫组织化学特性以及在开曼群岛最近发现的该神经元聚集体的复杂性，使用许多抗体研究了该核。将这些结果与其他羊膜动物的发现进行了比较。以下抗体给出了一致且可重复的结果：多克隆绵羊抗小白蛋白（PV），单克隆小鼠抗PV和多克隆绵羊抗谷氨酸脱羧酶（GAD）。在横向平面中，该原子核分为两个。在每个部分中，一组紧密的细胞位于前脑束纤维的顶部，这些纤维之间散布着细胞。在前脑外侧束中 该神经元聚集体由背侧足突核和网状周围核代表，而在前脑内侧束中，这些部分是间质核和该纤维束中的分散细胞。这项研究的结果如下。首先，凯门鳄的丘脑网状核含有GAD（+）和PV（+）神经元，这与其他羊膜动物中描述的相似。第二，背足小脑和网状核中许多GAD（+）和PV（+）神经元的形态和分布相似，表明这些神经元共定位这些标记。第三，间质核和内侧前脑束中的神经元是GAD（+）和PV（+）。在丘脑网状核的尾极，PV免疫反应性细胞占主导地位，避免了GAD（+）细胞优先定位的该核的中心部分。但是，与PV（+）细胞相比，GAD（+）细胞稀疏。尾极中此免疫组织化学上不同的区域被认为是与丘脑网状核分开的区域。