Nudell B, Grinnell A D
Brain Res. 1985 Mar 25;330(2):353-7. doi: 10.1016/0006-8993(85)90697-3.
More than 50% of the Xenopus pectoralis twitch muscle fibers with two distant endplates are innervated at both sites by the same neuron. This study indicates that there are three separable twitch motor unit types in this muscle which show very little overlap in innervation. This study also shows that each motor unit is topographically localized and that similar type units are shifted relative to one another. It is concluded that these two factors may contribute importantly to the observed high incidence of mononeuronal innervation.
超过50%的具有两个相距较远终板的非洲爪蟾胸肌快肌纤维在两个部位均由同一神经元支配。本研究表明，该肌肉中存在三种可分离的快肌运动单位类型，它们在神经支配上几乎没有重叠。本研究还表明，每个运动单位在局部都有定位，并且相似类型的单位相互之间发生了移位。得出的结论是，这两个因素可能对观察到的单神经元支配的高发生率有重要贡献。
