Thomas C K, Stein R B, Gordon T, Lee R G, Elleker M G
J Neurol Neurosurg Psychiatry. 1987 Mar;50(3):259-68. doi: 10.1136/jnnp.50.3.259.
Following complete ulnar or above-elbow median nerve sections, there was no significant correlation between motor unit size (twitch amplitude) and recruitment threshold, as assessed by spike triggered averaging. This absence of orderly recruitment was attributed to misdirection of motor axons during regeneration. Following median nerve section at wrist level, where the reinnervated muscles have more synergistic actions, orderly recruitment by size appeared to be re-established. Thus, the size principle of motor unit recruitment can be re-established after nerve section in humans, if motor axons innervate their original muscles or ones with closely synergistic functions.
在完全性尺神经或肘上正中神经切断后，通过触发尖峰平均法评估发现，运动单位大小（抽搐幅度）与募集阈值之间无显著相关性。这种有序募集的缺失归因于再生过程中运动轴突的错向生长。在腕部水平切断正中神经后，由于重新支配的肌肉具有更多协同作用，按大小顺序的有序募集似乎得以重新建立。因此，如果运动轴突支配其原来的肌肉或功能密切协同的肌肉，人类神经切断后运动单位募集的大小原则可以重新建立。
