首页> 外文期刊>The Journal of Comparative Neurology >Topographically organized projection to posterior insular cortex from the posterior portion of the ventral medial nucleus in the long-tailed macaque monkey
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Topographically organized projection to posterior insular cortex from the posterior portion of the ventral medial nucleus in the long-tailed macaque monkey

机译:从长尾猕猴腹内侧核后部向岛后皮质的地形组织投影

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Prior anterograde tracing work identified somatotopically organized lamina I trigemino- and spinothalamic terminations in a cytoarchitectonically distinct portion of posterolateral thalamus of the macaque monkey, named the posterior part of the ventral medial nucleus (VMpo; Craig [2004] J. Comp. Neurol. 477:119-148). Microelectrode recordings from clusters of selectively thermoreceptive or nociceptive neurons were used to guide precise microinjections of various tracers in VMpo. A prior report (Craig and Zhang [2006] J. Comp. Neurol. 499:953-964) described retrograde tracing results, which confirmed the selective lamina I input to VMpo and the anteroposterior (head to foot) topography. The present report describes the results of microinjections of anterograde tracers placed at different levels in VMpo, based on the anteroposterior topographic organization of selectively nociceptive units and clusters over nearly the entire extent of VMpo. Each injection produced dense, patchy terminal labeling in a single coherent field within a distinct granular cortical area centered in the fundus of the superior limiting sulcus. The terminations were distributed with a consistent anteroposterior topography over the posterior half of the superior limiting sulcus. These observations demonstrate a specific VMpo projection area in dorsal posterior insular cortex that provides the basis for a somatotopic representation of selectively nociceptive lamina I spinothalamic activity. These results also identify the VMpo terminal area as the posterior half of interoceptive cortex; the anterior half receives input from the vagal-responsive and gustatory neurons in the basal part of the ventral medial nucleus. J. Comp. Neurol. 522:36-63, 2014.
机译:先前的顺行性追踪工作在猕猴后外侧丘脑的一个细胞结构上不同的部分中,确定了体位组织的椎板I trigemino-和多刺的丘脑末端,命名为腹内侧核的后部(VMpo; Craig [2004] J. Comp。Neurol。477。 :119-148)。来自选择性受热或伤害感受性神经元簇的微电极记录用于指导VMpo中各种示踪剂的精确显微注射。先前的报道(Craig和Zhang [2006] J. Comp。Neurol。499:953-964)描述了逆行示踪结果,该结果证实了I输入到VMpo的选择性椎板和前后(头对脚)形貌。本报告基于选择性伤害感受单元和簇在几乎整个VMpo范围内的前后地形组织,描述了在VMpo中不同水平放置顺行示踪剂的显微注射结果。每次注射均在上限定沟的眼底中心的不同颗粒皮质区域内的单个相干区域中产生密集的,斑驳的末端标记。终止点分布在上下限沟后半部,前后前后地形一致。这些观察结果显示了背侧岛后皮层中的特定VMpo投影区域,该区域为选择性伤害感受性椎板I丘脑丘脑活动的体位表现提供了基础。这些结果还确定了VMpo末端区域为感觉皮质的后半部分。前半部分从腹内侧核基底部分的迷走神经反应性和味觉神经元接收输入。 J.比较神经元。 522:36-63,2014。

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