Innervation of the amphibian and basilar papillae in the leopard frog: reconstructions of single labeled fibers.
Innervation of the amphibian and basilar papillae in the leopard frog: reconstructions of single labeled fibers.
复制标题
豹蛙两栖动物和基底乳头的神经支配：单标记纤维的重建。
DOI：
10.1002/cne.903220205
复制
发表时间：
1992
期刊：
影响因子：
--
通讯作者：
Narins,PM
中科院分区：
文献类型：
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作者：
Simmons,DD;Bertolotto,C;Narins,PM
两栖动物有两个专门用于接收空气传播的声音的听觉器官：两栖动物乳头和基底乳头。在这份报告中，我们研究了豹蛙，蛙pipiens pipiens.Exterocellular注射生物胞素或辣根过氧化物酶（HRP）的听觉器官的神经节细胞和感觉上皮的传入神经支配的形态到第VIII神经，他们标记的神经节细胞，它们的轴突，和它们的终端纤维内的乳头。神经节细胞投射到两栖类乳头或基底乳头的细胞体在形态上与其他标记细胞不同。在两栖类乳头粗纤维终止于吻部和细纤维终止于尾部。标记的纤维在喙部旅行短的距离，然后与多达9个毛细胞接触，而标记的纤维在尾部旅行更长的距离，接触不超过5个毛细胞。基底乳头中的标记纤维较粗（约4 μm），终止于多达9个毛细胞上。与牛蛙的研究结果一致，我们的研究结果表明，两栖动物的乳头。Pipiens pipiens具有会聚神经支配（即，多个毛细胞向单个神经节细胞提供输入），并且在形貌上被组织。然而，在其他蛙类物种的报告相反，高度收敛的神经支配，如在两栖类乳头中发现的，也发现在基底乳头。© 1992 Wiley利斯公司
Amphibians have two auditory organs specialized for reception of airborne sounds: the amphibian papilla and the basilar papilla. In this report we examine the morphology of the ganglion cells and the afferent innervation of the sensory epithelium in both auditory organs of the leopard frog,Rana pipiens pipiens.Extracellular injections of either biocytin or horseradish peroxidase (HRP) were made into the VIII nerve; they labeled ganglion cells, their axons, and their terminal fibers within the papillae. Ganglion cells that projected to either the amphibian papilla or basilar papilla had cell bodies that were morphologically distinct from other labeled cells. In the amphibian papilla thick fibers terminated in the rostral portion and thin fibers terminated in the caudal portion. Labeled fibers in the rostral portion traveled short distances before making contacts with up to nine hair cells whereas labeled fibers in the caudal portion traveled longer distances and contacted no more than five hair cells. In the basilar papilla labeled fibers were thick (around 4 μm) and terminated on as many as nine hair cells. Consistent with studies from the bullfrog,Rana catesbeiana, our results suggest that the amphibian papilla ofR. pipiens pipienshas a convergent innervation (i.e., multiple hair cells provide input to a single ganglion cell) and is topographically organized. However, in contrast to reports in other ranid species, a highly convergent innervation like that found in the amphibian papilla is also found in the basilar papilla. © 1992 Wiley‐Liss, Inc.