A study of motor unit structure by means of scanning EMG
A study of motor unit structure by means of scanning EMG
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扫描肌电图研究运动单位结构
DOI：
10.1002/mus.880150314
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发表时间：
1992
期刊：
影响因子：
3.4
通讯作者：
D. Stegeman
中科院分区：
文献类型：
--
作者：
T. Gootzen;D. M. Vingerhoets;D. Stegeman
我们使用扫描肌电技术研究了人股四头肌肌肉运动单位的结构。一组健康志愿者和两组被证实为神经源性或肌源性神经肌肉病理的患者进行了研究。总共获得了86次扫描。对运动单位区域的估计(S)将两组患者分开：肌源性患者的大部分区域小于4 mm，而神经源性患者几乎所有的运动单位区域都大于4 mm。然而，病理单位的大小仅偶尔超过正常单位的上下限(2~8 mm)。肌源性扫描显示，平均而言，运动单位内MUAP之间的时间离散度(T)比正常扫描大得多。这些发现与其他人用同样的技术观察到的结果一致。对于神经病变扫描，S与T之间存在显著的正相关，而在肌病扫描中则完全不存在。这些观察结果与当前运动单位生理学和解剖学的形态计量学知识相抵触。
We used the scanning EMG technique to investigate the structure of human quadriceps muscle motor units. A group of healthy volunteers and 2 groups of patients with proven neurogenic or myogenic neuromuscular pathology have been studied. In total, 86 scans were obtained. An estimate of the motor unit territory (S) separates the 2 patient groups: the majority of territories of myogenic patients are smaller than 4 mm, whereas almost all motor unit territories of neurogenic patients are larger. However, the sizes of the pathologic units only occasionally exceed the upper and lower limits of normal units (2 to 8 mm). The myogenic scans show, on average, a much larger temporal dispersion (T) between the MUAPs within a motor unit than the normal scans. These findings are in accordance with observations with the same technique by others. For the neuropathic scans, there is a significant positive correlation between S and T, which is completely absent in myopathic scans. These observations are confronted with current morphometrical knowledge on motor unit physiology and anatomy.