Distribution of hypoglossal motor neurons innervating the prehensile tongue of the African pig-nosed frog, Hemisus marmoratum.
Distribution of hypoglossal motor neurons innervating the prehensile tongue of the African pig-nosed frog, Hemisus marmoratum.
复制标题
支配非洲猪鼻蛙 Hemisus marmoratum 抓握舌头的舌下运动神经元的分布。
DOI：
10.1016/s0304-3940(98)00111-6
复制
发表时间：
1998
影响因子：
2.5
通讯作者：
Keifer,J
中科院分区：
文献类型：
--
作者：
Anderson,CW;Nishikawa,KC;Keifer,J
采用逆行神经元示踪技术，对非洲猪鼻蛙（Hemisus marmoratum）舌下神经运动神经元的分布进行了研究。该物种是一种完全不同的无尾两栖动物，有一个可以在相对于头部的三个维度上瞄准的舌头。结果表明，腹外侧舌下神经核和一个不寻常的大量的运动神经元在这个细胞群中的独特的rostrocaudal分布。在长的、可伸缩的舌的进化过程中，支配舌的运动神经元的数量大大增加，并且与其他无尾类动物相比，它们在脑干和脊髓中的分布更加尾侧。这些观察结果的影响，了解运动神经元的神经元重构的新形态，需要新的肌肉激活模式。
Using retrograde neuronal tracers, a study of the distribution of hypoglossal motor neurons innervating the tongue musculature was performed in the African pig-nosed frog, Hemisus marmoratum. This species is a radically divergent anuran amphibian with a prehensile tongue that can be aimed in three dimensions relative to the head. The results illustrate a unique rostrocaudal distribution of the ventrolateral hypoglossal nucleus and an unusually large number of motor neurons within this cell group. During the evolution of the long, prehensile tongue of Hemisus, the motor neurons innervating the tongue have greatly increased in number and have become more caudally distributed in the brainstem and spinal cord compared to other anurans. These observations have implications for understanding neuronal reconfiguring of motoneurons for novel morphologies requiring new muscle activation patterns.