Catecholamine neurons in the brainstem of the reptile Caiman crocodilus.
Catecholamine neurons in the brainstem of the reptile Caiman crocodilus.
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爬行动物凯门鳄脑干中的儿茶酚胺神经元。
DOI：
10.1002/cne.902700302
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发表时间：
1988
期刊：
影响因子：
--
通讯作者：
Brauth,SE
中科院分区：
文献类型：
--
作者：
Brauth,SE
用免疫组织化学方法研究了鳄鱼脑干内酪氨酸羟化酶样免疫反应（TH）神经元的分布。结果表明，许多先前描述的哺乳动物和鸟类的儿茶酚胺系统存在于凯门鳄的脑干。在髓质内，许多免疫反应神经元围绕中央管。该神经元场向吻侧延伸至迷走神经背侧运动核水平。许多TH神经元与孤核区域重叠，并且源自这些神经元的广泛的纤维系统腹侧和侧向地延伸到与三叉神经的降核紧邻的区域中。一些TH神经元也存在于延髓腹外侧被盖在这个水平。在脑桥和中脑中存在大量的TH细胞。这些包括蓝斑、腹侧蓝斑下核、背侧蓝斑下核、黑质（Brauth等人，'83）和Tsai腹侧区。在凯门鳄的subcoeruleus核是相当大的比其他爬行动物物种，包括海龟和蜥蜴和非常类似的subcoeruleus核的鸟类在位置和前后的程度。在间脑内，许多小的，强烈染色，TH-免疫反应和CSF接触神经元内观察到的视前隐窝，并在靠近脑室壁在rostra 1下丘脑和视前水平。许多强烈染色，免疫反应阳性细胞体中观察到的下丘脑内侧的A13细胞群的哺乳动物的位置相似。在下丘脑，TH神经元完全包围前脑束的腹脚（其中含有袢的纤维），并延伸到丘脑腹内侧和腹外侧区。正中隆起的外层有丰富的TH阳性轴突和终末丛。
Immunohistochemical methods were used to map the distribution of neurons exhibiting tyrosine hydroxylase-like immunoreactivity (TH) in the brainstem of the reptile Caiman crocodilus. The results reveal that many catecholamine systems previously described in mammalian and avian species are present in the brainstem of the caiman. Within the medulla, many immunoreactive neurons surround the central canal. This neuronal field extends rostrally to the level of the dorsal motor nucleus of the vagus. Many TH neurons overlap the region of the solitary nucleus, and an extensive system of fibers derived from these neurons extends ventrally and laterally into the region immediately bordering the descending nucleus of the trigeminal nerve. Some TH neurons are also present in the ventrolateral tegmentum of the medulla at this level. A large number of TH cells are present in the pons and midbrain. These include the locus coeruleus, nucleus subcoeruleus ventralis, nucleus subcoeruleus dorsalis, substantia nigra (Brauth et al.,'83), and area ventralis of Tsai. The subcoeruleus nuclei are considerably larger in the caiman than in other reptilian species including turtles and lizards and closely resemble the subcoeruleus nuclei of birds in terms of position and anterior-posterior extent. Within the diencephalon, numerous small, intensely staining, TH-immunoreactive and CSF-contacting neurons were observed within the preoptic recess and in close proximity to the ventricular wall at rostra1 hypothalamic and preoptic levels. Many intensely stained, immunoreactive cell bodies were observed in the medial hypothalamus similar in position to the A13 cell group of mammals. In the subthalamus, TH neurons completely surround the ventral peduncle of the forebrain bundle (which contains fibers of the ansa lenticularis) and extend into the ventromedial and ventrolateral thalamic areas. A rich plexus of TH-positive axons and terminals invests the external layer of the median eminence.